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linux_dsm_epyc7002/drivers/block/cciss.c
James Morris 88e9d34c72 seq_file: constify seq_operations 
Make all seq_operations structs const, to help mitigate against
revectoring user-triggerable function pointers.

This is derived from the grsecurity patch, although generated from scratch
because it's simpler than extracting the changes from there.

Signed-off-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-23 07:39:29 -07:00

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/*
* Disk Array driver for HP Smart Array controllers.
* (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA.
*
* Questions/Comments/Bugfixes to iss_storagedev@hp.com
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/delay.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/bio.h>
#include <linux/blkpg.h>
#include <linux/timer.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/hdreg.h>
#include <linux/spinlock.h>
#include <linux/compat.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
#include <linux/completion.h>
#include <scsi/scsi.h>
#include <scsi/sg.h>
#include <scsi/scsi_ioctl.h>
#include <linux/cdrom.h>
#include <linux/scatterlist.h>
#include <linux/kthread.h>
#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
/* Embedded module documentation macros - see modules.h */
MODULE_AUTHOR("Hewlett-Packard Company");
MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
" SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
" Smart Array G2 Series SAS/SATA Controllers");
MODULE_VERSION("3.6.20");
MODULE_LICENSE("GPL");
#include "cciss_cmd.h"
#include "cciss.h"
#include <linux/cciss_ioctl.h>
/* define the PCI info for the cards we can control */
static const struct pci_device_id cciss_pci_device_id[] = {
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
{PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
{PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
{PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
{0,}
};
MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
/* board_id = Subsystem Device ID & Vendor ID
* product = Marketing Name for the board
* access = Address of the struct of function pointers
*/
static struct board_type products[] = {
{0x40700E11, "Smart Array 5300", &SA5_access},
{0x40800E11, "Smart Array 5i", &SA5B_access},
{0x40820E11, "Smart Array 532", &SA5B_access},
{0x40830E11, "Smart Array 5312", &SA5B_access},
{0x409A0E11, "Smart Array 641", &SA5_access},
{0x409B0E11, "Smart Array 642", &SA5_access},
{0x409C0E11, "Smart Array 6400", &SA5_access},
{0x409D0E11, "Smart Array 6400 EM", &SA5_access},
{0x40910E11, "Smart Array 6i", &SA5_access},
{0x3225103C, "Smart Array P600", &SA5_access},
{0x3223103C, "Smart Array P800", &SA5_access},
{0x3234103C, "Smart Array P400", &SA5_access},
{0x3235103C, "Smart Array P400i", &SA5_access},
{0x3211103C, "Smart Array E200i", &SA5_access},
{0x3212103C, "Smart Array E200", &SA5_access},
{0x3213103C, "Smart Array E200i", &SA5_access},
{0x3214103C, "Smart Array E200i", &SA5_access},
{0x3215103C, "Smart Array E200i", &SA5_access},
{0x3237103C, "Smart Array E500", &SA5_access},
{0x323D103C, "Smart Array P700m", &SA5_access},
{0x3241103C, "Smart Array P212", &SA5_access},
{0x3243103C, "Smart Array P410", &SA5_access},
{0x3245103C, "Smart Array P410i", &SA5_access},
{0x3247103C, "Smart Array P411", &SA5_access},
{0x3249103C, "Smart Array P812", &SA5_access},
{0x324A103C, "Smart Array P712m", &SA5_access},
{0x324B103C, "Smart Array P711m", &SA5_access},
{0xFFFF103C, "Unknown Smart Array", &SA5_access},
};
/* How long to wait (in milliseconds) for board to go into simple mode */
#define MAX_CONFIG_WAIT 30000
#define MAX_IOCTL_CONFIG_WAIT 1000
/*define how many times we will try a command because of bus resets */
#define MAX_CMD_RETRIES 3
#define MAX_CTLR 32
/* Originally cciss driver only supports 8 major numbers */
#define MAX_CTLR_ORIG 8
static ctlr_info_t *hba[MAX_CTLR];
static void do_cciss_request(struct request_queue *q);
static irqreturn_t do_cciss_intr(int irq, void *dev_id);
static int cciss_open(struct block_device *bdev, fmode_t mode);
static int cciss_release(struct gendisk *disk, fmode_t mode);
static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg);
static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
static int cciss_revalidate(struct gendisk *disk);
static int rebuild_lun_table(ctlr_info_t *h, int first_time);
static int deregister_disk(ctlr_info_t *h, int drv_index,
int clear_all);
static void cciss_read_capacity(int ctlr, int logvol, int withirq,
sector_t *total_size, unsigned int *block_size);
static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
sector_t *total_size, unsigned int *block_size);
static void cciss_geometry_inquiry(int ctlr, int logvol,
int withirq, sector_t total_size,
unsigned int block_size, InquiryData_struct *inq_buff,
drive_info_struct *drv);
static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
__u32);
static void start_io(ctlr_info_t *h);
static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char *scsi3addr, int cmd_type);
static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char scsi3addr[],
int cmd_type);
static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
int attempt_retry);
static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
static void fail_all_cmds(unsigned long ctlr);
static int scan_thread(void *data);
static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
#ifdef CONFIG_PROC_FS
static void cciss_procinit(int i);
#else
static void cciss_procinit(int i)
{
}
#endif /* CONFIG_PROC_FS */
#ifdef CONFIG_COMPAT
static int cciss_compat_ioctl(struct block_device *, fmode_t,
unsigned, unsigned long);
#endif
static const struct block_device_operations cciss_fops = {
.owner = THIS_MODULE,
.open = cciss_open,
.release = cciss_release,
.locked_ioctl = cciss_ioctl,
.getgeo = cciss_getgeo,
#ifdef CONFIG_COMPAT
.compat_ioctl = cciss_compat_ioctl,
#endif
.revalidate_disk = cciss_revalidate,
};
/*
* Enqueuing and dequeuing functions for cmdlists.
*/
static inline void addQ(struct hlist_head *list, CommandList_struct *c)
{
hlist_add_head(&c->list, list);
}
static inline void removeQ(CommandList_struct *c)
{
/*
* After kexec/dump some commands might still
* be in flight, which the firmware will try
* to complete. Resetting the firmware doesn't work
* with old fw revisions, so we have to mark
* them off as 'stale' to prevent the driver from
* falling over.
*/
if (WARN_ON(hlist_unhashed(&c->list))) {
c->cmd_type = CMD_MSG_STALE;
return;
}
hlist_del_init(&c->list);
}
#include "cciss_scsi.c" /* For SCSI tape support */
#define RAID_UNKNOWN 6
#ifdef CONFIG_PROC_FS
/*
* Report information about this controller.
*/
#define ENG_GIG 1000000000
#define ENG_GIG_FACTOR (ENG_GIG/512)
#define ENGAGE_SCSI "engage scsi"
static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
"UNKNOWN"
};
static struct proc_dir_entry *proc_cciss;
static void cciss_seq_show_header(struct seq_file *seq)
{
ctlr_info_t *h = seq->private;
seq_printf(seq, "%s: HP %s Controller\n"
"Board ID: 0x%08lx\n"
"Firmware Version: %c%c%c%c\n"
"IRQ: %d\n"
"Logical drives: %d\n"
"Current Q depth: %d\n"
"Current # commands on controller: %d\n"
"Max Q depth since init: %d\n"
"Max # commands on controller since init: %d\n"
"Max SG entries since init: %d\n",
h->devname,
h->product_name,
(unsigned long)h->board_id,
h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
h->num_luns,
h->Qdepth, h->commands_outstanding,
h->maxQsinceinit, h->max_outstanding, h->maxSG);
#ifdef CONFIG_CISS_SCSI_TAPE
cciss_seq_tape_report(seq, h->ctlr);
#endif /* CONFIG_CISS_SCSI_TAPE */
}
static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
{
ctlr_info_t *h = seq->private;
unsigned ctlr = h->ctlr;
unsigned long flags;
/* prevent displaying bogus info during configuration
* or deconfiguration of a logical volume
*/
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
if (h->busy_configuring) {
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
return ERR_PTR(-EBUSY);
}
h->busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
if (*pos == 0)
cciss_seq_show_header(seq);
return pos;
}
static int cciss_seq_show(struct seq_file *seq, void *v)
{
sector_t vol_sz, vol_sz_frac;
ctlr_info_t *h = seq->private;
unsigned ctlr = h->ctlr;
loff_t *pos = v;
drive_info_struct *drv = &h->drv[*pos];
if (*pos > h->highest_lun)
return 0;
if (drv->heads == 0)
return 0;
vol_sz = drv->nr_blocks;
vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
vol_sz_frac *= 100;
sector_div(vol_sz_frac, ENG_GIG_FACTOR);
if (drv->raid_level > 5)
drv->raid_level = RAID_UNKNOWN;
seq_printf(seq, "cciss/c%dd%d:"
"\t%4u.%02uGB\tRAID %s\n",
ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
raid_label[drv->raid_level]);
return 0;
}
static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
ctlr_info_t *h = seq->private;
if (*pos > h->highest_lun)
return NULL;
*pos += 1;
return pos;
}
static void cciss_seq_stop(struct seq_file *seq, void *v)
{
ctlr_info_t *h = seq->private;
/* Only reset h->busy_configuring if we succeeded in setting
* it during cciss_seq_start. */
if (v == ERR_PTR(-EBUSY))
return;
h->busy_configuring = 0;
}
static const struct seq_operations cciss_seq_ops = {
.start = cciss_seq_start,
.show = cciss_seq_show,
.next = cciss_seq_next,
.stop = cciss_seq_stop,
};
static int cciss_seq_open(struct inode *inode, struct file *file)
{
int ret = seq_open(file, &cciss_seq_ops);
struct seq_file *seq = file->private_data;
if (!ret)
seq->private = PDE(inode)->data;
return ret;
}
static ssize_t
cciss_proc_write(struct file *file, const char __user *buf,
size_t length, loff_t *ppos)
{
int err;
char *buffer;
#ifndef CONFIG_CISS_SCSI_TAPE
return -EINVAL;
#endif
if (!buf || length > PAGE_SIZE - 1)
return -EINVAL;
buffer = (char *)__get_free_page(GFP_KERNEL);
if (!buffer)
return -ENOMEM;
err = -EFAULT;
if (copy_from_user(buffer, buf, length))
goto out;
buffer[length] = '\0';
#ifdef CONFIG_CISS_SCSI_TAPE
if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
struct seq_file *seq = file->private_data;
ctlr_info_t *h = seq->private;
int rc;
rc = cciss_engage_scsi(h->ctlr);
if (rc != 0)
err = -rc;
else
err = length;
} else
#endif /* CONFIG_CISS_SCSI_TAPE */
err = -EINVAL;
/* might be nice to have "disengage" too, but it's not
safely possible. (only 1 module use count, lock issues.) */
out:
free_page((unsigned long)buffer);
return err;
}
static struct file_operations cciss_proc_fops = {
.owner = THIS_MODULE,
.open = cciss_seq_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
.write = cciss_proc_write,
};
static void __devinit cciss_procinit(int i)
{
struct proc_dir_entry *pde;
if (proc_cciss == NULL)
proc_cciss = proc_mkdir("driver/cciss", NULL);
if (!proc_cciss)
return;
pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
S_IROTH, proc_cciss,
&cciss_proc_fops, hba[i]);
}
#endif /* CONFIG_PROC_FS */
#define MAX_PRODUCT_NAME_LEN 19
#define to_hba(n) container_of(n, struct ctlr_info, dev)
#define to_drv(n) container_of(n, drive_info_struct, dev)
static struct device_type cciss_host_type = {
.name = "cciss_host",
};
static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
char *buf)
{
drive_info_struct *drv = to_drv(dev);
struct ctlr_info *h = to_hba(drv->dev.parent);
__u8 sn[16];
unsigned long flags;
int ret = 0;
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(sn, drv->serial_no, sizeof(sn));
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, 16 * 2 + 2,
"%02X%02X%02X%02X%02X%02X%02X%02X"
"%02X%02X%02X%02X%02X%02X%02X%02X\n",
sn[0], sn[1], sn[2], sn[3],
sn[4], sn[5], sn[6], sn[7],
sn[8], sn[9], sn[10], sn[11],
sn[12], sn[13], sn[14], sn[15]);
}
DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
static ssize_t dev_show_vendor(struct device *dev,
struct device_attribute *attr,
char *buf)
{
drive_info_struct *drv = to_drv(dev);
struct ctlr_info *h = to_hba(drv->dev.parent);
char vendor[VENDOR_LEN + 1];
unsigned long flags;
int ret = 0;
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
}
DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
static ssize_t dev_show_model(struct device *dev,
struct device_attribute *attr,
char *buf)
{
drive_info_struct *drv = to_drv(dev);
struct ctlr_info *h = to_hba(drv->dev.parent);
char model[MODEL_LEN + 1];
unsigned long flags;
int ret = 0;
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(model, drv->model, MODEL_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
}
DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
static ssize_t dev_show_rev(struct device *dev,
struct device_attribute *attr,
char *buf)
{
drive_info_struct *drv = to_drv(dev);
struct ctlr_info *h = to_hba(drv->dev.parent);
char rev[REV_LEN + 1];
unsigned long flags;
int ret = 0;
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring)
ret = -EBUSY;
else
memcpy(rev, drv->rev, REV_LEN + 1);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
if (ret)
return ret;
else
return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
}
DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
static struct attribute *cciss_dev_attrs[] = {
&dev_attr_unique_id.attr,
&dev_attr_model.attr,
&dev_attr_vendor.attr,
&dev_attr_rev.attr,
NULL
};
static struct attribute_group cciss_dev_attr_group = {
.attrs = cciss_dev_attrs,
};
static const struct attribute_group *cciss_dev_attr_groups[] = {
&cciss_dev_attr_group,
NULL
};
static struct device_type cciss_dev_type = {
.name = "cciss_device",
.groups = cciss_dev_attr_groups,
};
static struct bus_type cciss_bus_type = {
.name = "cciss",
};
/*
* Initialize sysfs entry for each controller. This sets up and registers
* the 'cciss#' directory for each individual controller under
* /sys/bus/pci/devices/<dev>/.
*/
static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
{
device_initialize(&h->dev);
h->dev.type = &cciss_host_type;
h->dev.bus = &cciss_bus_type;
dev_set_name(&h->dev, "%s", h->devname);
h->dev.parent = &h->pdev->dev;
return device_add(&h->dev);
}
/*
* Remove sysfs entries for an hba.
*/
static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
{
device_del(&h->dev);
}
/*
* Initialize sysfs for each logical drive. This sets up and registers
* the 'c#d#' directory for each individual logical drive under
* /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
* /sys/block/cciss!c#d# to this entry.
*/
static int cciss_create_ld_sysfs_entry(struct ctlr_info *h,
drive_info_struct *drv,
int drv_index)
{
device_initialize(&drv->dev);
drv->dev.type = &cciss_dev_type;
drv->dev.bus = &cciss_bus_type;
dev_set_name(&drv->dev, "c%dd%d", h->ctlr, drv_index);
drv->dev.parent = &h->dev;
return device_add(&drv->dev);
}
/*
* Remove sysfs entries for a logical drive.
*/
static void cciss_destroy_ld_sysfs_entry(drive_info_struct *drv)
{
device_del(&drv->dev);
}
/*
* For operations that cannot sleep, a command block is allocated at init,
* and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
* which ones are free or in use. For operations that can wait for kmalloc
* to possible sleep, this routine can be called with get_from_pool set to 0.
* cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
*/
static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
{
CommandList_struct *c;
int i;
u64bit temp64;
dma_addr_t cmd_dma_handle, err_dma_handle;
if (!get_from_pool) {
c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
sizeof(CommandList_struct), &cmd_dma_handle);
if (c == NULL)
return NULL;
memset(c, 0, sizeof(CommandList_struct));
c->cmdindex = -1;
c->err_info = (ErrorInfo_struct *)
pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
&err_dma_handle);
if (c->err_info == NULL) {
pci_free_consistent(h->pdev,
sizeof(CommandList_struct), c, cmd_dma_handle);
return NULL;
}
memset(c->err_info, 0, sizeof(ErrorInfo_struct));
} else { /* get it out of the controllers pool */
do {
i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
if (i == h->nr_cmds)
return NULL;
} while (test_and_set_bit
(i & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
#endif
c = h->cmd_pool + i;
memset(c, 0, sizeof(CommandList_struct));
cmd_dma_handle = h->cmd_pool_dhandle
+ i * sizeof(CommandList_struct);
c->err_info = h->errinfo_pool + i;
memset(c->err_info, 0, sizeof(ErrorInfo_struct));
err_dma_handle = h->errinfo_pool_dhandle
+ i * sizeof(ErrorInfo_struct);
h->nr_allocs++;
c->cmdindex = i;
}
INIT_HLIST_NODE(&c->list);
c->busaddr = (__u32) cmd_dma_handle;
temp64.val = (__u64) err_dma_handle;
c->ErrDesc.Addr.lower = temp64.val32.lower;
c->ErrDesc.Addr.upper = temp64.val32.upper;
c->ErrDesc.Len = sizeof(ErrorInfo_struct);
c->ctlr = h->ctlr;
return c;
}
/*
* Frees a command block that was previously allocated with cmd_alloc().
*/
static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
{
int i;
u64bit temp64;
if (!got_from_pool) {
temp64.val32.lower = c->ErrDesc.Addr.lower;
temp64.val32.upper = c->ErrDesc.Addr.upper;
pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
c->err_info, (dma_addr_t) temp64.val);
pci_free_consistent(h->pdev, sizeof(CommandList_struct),
c, (dma_addr_t) c->busaddr);
} else {
i = c - h->cmd_pool;
clear_bit(i & (BITS_PER_LONG - 1),
h->cmd_pool_bits + (i / BITS_PER_LONG));
h->nr_frees++;
}
}
static inline ctlr_info_t *get_host(struct gendisk *disk)
{
return disk->queue->queuedata;
}
static inline drive_info_struct *get_drv(struct gendisk *disk)
{
return disk->private_data;
}
/*
* Open. Make sure the device is really there.
*/
static int cciss_open(struct block_device *bdev, fmode_t mode)
{
ctlr_info_t *host = get_host(bdev->bd_disk);
drive_info_struct *drv = get_drv(bdev->bd_disk);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
#endif /* CCISS_DEBUG */
if (host->busy_initializing || drv->busy_configuring)
return -EBUSY;
/*
* Root is allowed to open raw volume zero even if it's not configured
* so array config can still work. Root is also allowed to open any
* volume that has a LUN ID, so it can issue IOCTL to reread the
* disk information. I don't think I really like this
* but I'm already using way to many device nodes to claim another one
* for "raw controller".
*/
if (drv->heads == 0) {
if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
/* if not node 0 make sure it is a partition = 0 */
if (MINOR(bdev->bd_dev) & 0x0f) {
return -ENXIO;
/* if it is, make sure we have a LUN ID */
} else if (drv->LunID == 0) {
return -ENXIO;
}
}
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
}
drv->usage_count++;
host->usage_count++;
return 0;
}
/*
* Close. Sync first.
*/
static int cciss_release(struct gendisk *disk, fmode_t mode)
{
ctlr_info_t *host = get_host(disk);
drive_info_struct *drv = get_drv(disk);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
#endif /* CCISS_DEBUG */
drv->usage_count--;
host->usage_count--;
return 0;
}
#ifdef CONFIG_COMPAT
static int do_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
int ret;
lock_kernel();
ret = cciss_ioctl(bdev, mode, cmd, arg);
unlock_kernel();
return ret;
}
static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg);
static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg);
static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
switch (cmd) {
case CCISS_GETPCIINFO:
case CCISS_GETINTINFO:
case CCISS_SETINTINFO:
case CCISS_GETNODENAME:
case CCISS_SETNODENAME:
case CCISS_GETHEARTBEAT:
case CCISS_GETBUSTYPES:
case CCISS_GETFIRMVER:
case CCISS_GETDRIVVER:
case CCISS_REVALIDVOLS:
case CCISS_DEREGDISK:
case CCISS_REGNEWDISK:
case CCISS_REGNEWD:
case CCISS_RESCANDISK:
case CCISS_GETLUNINFO:
return do_ioctl(bdev, mode, cmd, arg);
case CCISS_PASSTHRU32:
return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
case CCISS_BIG_PASSTHRU32:
return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
default:
return -ENOIOCTLCMD;
}
}
static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
IOCTL32_Command_struct __user *arg32 =
(IOCTL32_Command_struct __user *) arg;
IOCTL_Command_struct arg64;
IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
int err;
u32 cp;
err = 0;
err |=
copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
sizeof(arg64.LUN_info));
err |=
copy_from_user(&arg64.Request, &arg32->Request,
sizeof(arg64.Request));
err |=
copy_from_user(&arg64.error_info, &arg32->error_info,
sizeof(arg64.error_info));
err |= get_user(arg64.buf_size, &arg32->buf_size);
err |= get_user(cp, &arg32->buf);
arg64.buf = compat_ptr(cp);
err |= copy_to_user(p, &arg64, sizeof(arg64));
if (err)
return -EFAULT;
err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
if (err)
return err;
err |=
copy_in_user(&arg32->error_info, &p->error_info,
sizeof(arg32->error_info));
if (err)
return -EFAULT;
return err;
}
static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
unsigned cmd, unsigned long arg)
{
BIG_IOCTL32_Command_struct __user *arg32 =
(BIG_IOCTL32_Command_struct __user *) arg;
BIG_IOCTL_Command_struct arg64;
BIG_IOCTL_Command_struct __user *p =
compat_alloc_user_space(sizeof(arg64));
int err;
u32 cp;
err = 0;
err |=
copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
sizeof(arg64.LUN_info));
err |=
copy_from_user(&arg64.Request, &arg32->Request,
sizeof(arg64.Request));
err |=
copy_from_user(&arg64.error_info, &arg32->error_info,
sizeof(arg64.error_info));
err |= get_user(arg64.buf_size, &arg32->buf_size);
err |= get_user(arg64.malloc_size, &arg32->malloc_size);
err |= get_user(cp, &arg32->buf);
arg64.buf = compat_ptr(cp);
err |= copy_to_user(p, &arg64, sizeof(arg64));
if (err)
return -EFAULT;
err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
if (err)
return err;
err |=
copy_in_user(&arg32->error_info, &p->error_info,
sizeof(arg32->error_info));
if (err)
return -EFAULT;
return err;
}
#endif
static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
drive_info_struct *drv = get_drv(bdev->bd_disk);
if (!drv->cylinders)
return -ENXIO;
geo->heads = drv->heads;
geo->sectors = drv->sectors;
geo->cylinders = drv->cylinders;
return 0;
}
static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
{
if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
(void)check_for_unit_attention(host, c);
}
/*
* ioctl
*/
static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
struct gendisk *disk = bdev->bd_disk;
ctlr_info_t *host = get_host(disk);
drive_info_struct *drv = get_drv(disk);
int ctlr = host->ctlr;
void __user *argp = (void __user *)arg;
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
#endif /* CCISS_DEBUG */
switch (cmd) {
case CCISS_GETPCIINFO:
{
cciss_pci_info_struct pciinfo;
if (!arg)
return -EINVAL;
pciinfo.domain = pci_domain_nr(host->pdev->bus);
pciinfo.bus = host->pdev->bus->number;
pciinfo.dev_fn = host->pdev->devfn;
pciinfo.board_id = host->board_id;
if (copy_to_user
(argp, &pciinfo, sizeof(cciss_pci_info_struct)))
return -EFAULT;
return 0;
}
case CCISS_GETINTINFO:
{
cciss_coalint_struct intinfo;
if (!arg)
return -EINVAL;
intinfo.delay =
readl(&host->cfgtable->HostWrite.CoalIntDelay);
intinfo.count =
readl(&host->cfgtable->HostWrite.CoalIntCount);
if (copy_to_user
(argp, &intinfo, sizeof(cciss_coalint_struct)))
return -EFAULT;
return 0;
}
case CCISS_SETINTINFO:
{
cciss_coalint_struct intinfo;
unsigned long flags;
int i;
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user
(&intinfo, argp, sizeof(cciss_coalint_struct)))
return -EFAULT;
if ((intinfo.delay == 0) && (intinfo.count == 0))
{
// printk("cciss_ioctl: delay and count cannot be 0\n");
return -EINVAL;
}
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
/* Update the field, and then ring the doorbell */
writel(intinfo.delay,
&(host->cfgtable->HostWrite.CoalIntDelay));
writel(intinfo.count,
&(host->cfgtable->HostWrite.CoalIntCount));
writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
if (!(readl(host->vaddr + SA5_DOORBELL)
& CFGTBL_ChangeReq))
break;
/* delay and try again */
udelay(1000);
}
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
if (i >= MAX_IOCTL_CONFIG_WAIT)
return -EAGAIN;
return 0;
}
case CCISS_GETNODENAME:
{
NodeName_type NodeName;
int i;
if (!arg)
return -EINVAL;
for (i = 0; i < 16; i++)
NodeName[i] =
readb(&host->cfgtable->ServerName[i]);
if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
return -EFAULT;
return 0;
}
case CCISS_SETNODENAME:
{
NodeName_type NodeName;
unsigned long flags;
int i;
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (copy_from_user
(NodeName, argp, sizeof(NodeName_type)))
return -EFAULT;
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
/* Update the field, and then ring the doorbell */
for (i = 0; i < 16; i++)
writeb(NodeName[i],
&host->cfgtable->ServerName[i]);
writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
if (!(readl(host->vaddr + SA5_DOORBELL)
& CFGTBL_ChangeReq))
break;
/* delay and try again */
udelay(1000);
}
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
if (i >= MAX_IOCTL_CONFIG_WAIT)
return -EAGAIN;
return 0;
}
case CCISS_GETHEARTBEAT:
{
Heartbeat_type heartbeat;
if (!arg)
return -EINVAL;
heartbeat = readl(&host->cfgtable->HeartBeat);
if (copy_to_user
(argp, &heartbeat, sizeof(Heartbeat_type)))
return -EFAULT;
return 0;
}
case CCISS_GETBUSTYPES:
{
BusTypes_type BusTypes;
if (!arg)
return -EINVAL;
BusTypes = readl(&host->cfgtable->BusTypes);
if (copy_to_user
(argp, &BusTypes, sizeof(BusTypes_type)))
return -EFAULT;
return 0;
}
case CCISS_GETFIRMVER:
{
FirmwareVer_type firmware;
if (!arg)
return -EINVAL;
memcpy(firmware, host->firm_ver, 4);
if (copy_to_user
(argp, firmware, sizeof(FirmwareVer_type)))
return -EFAULT;
return 0;
}
case CCISS_GETDRIVVER:
{
DriverVer_type DriverVer = DRIVER_VERSION;
if (!arg)
return -EINVAL;
if (copy_to_user
(argp, &DriverVer, sizeof(DriverVer_type)))
return -EFAULT;
return 0;
}
case CCISS_DEREGDISK:
case CCISS_REGNEWD:
case CCISS_REVALIDVOLS:
return rebuild_lun_table(host, 0);
case CCISS_GETLUNINFO:{
LogvolInfo_struct luninfo;
luninfo.LunID = drv->LunID;
luninfo.num_opens = drv->usage_count;
luninfo.num_parts = 0;
if (copy_to_user(argp, &luninfo,
sizeof(LogvolInfo_struct)))
return -EFAULT;
return 0;
}
case CCISS_PASSTHRU:
{
IOCTL_Command_struct iocommand;
CommandList_struct *c;
char *buff = NULL;
u64bit temp64;
unsigned long flags;
DECLARE_COMPLETION_ONSTACK(wait);
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
if (copy_from_user
(&iocommand, argp, sizeof(IOCTL_Command_struct)))
return -EFAULT;
if ((iocommand.buf_size < 1) &&
(iocommand.Request.Type.Direction != XFER_NONE)) {
return -EINVAL;
}
#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
/* Check kmalloc limits */
if (iocommand.buf_size > 128000)
return -EINVAL;
#endif
if (iocommand.buf_size > 0) {
buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
if (buff == NULL)
return -EFAULT;
}
if (iocommand.Request.Type.Direction == XFER_WRITE) {
/* Copy the data into the buffer we created */
if (copy_from_user
(buff, iocommand.buf, iocommand.buf_size)) {
kfree(buff);
return -EFAULT;
}
} else {
memset(buff, 0, iocommand.buf_size);
}
if ((c = cmd_alloc(host, 0)) == NULL) {
kfree(buff);
return -ENOMEM;
}
// Fill in the command type
c->cmd_type = CMD_IOCTL_PEND;
// Fill in Command Header
c->Header.ReplyQueue = 0; // unused in simple mode
if (iocommand.buf_size > 0) // buffer to fill
{
c->Header.SGList = 1;
c->Header.SGTotal = 1;
} else // no buffers to fill
{
c->Header.SGList = 0;
c->Header.SGTotal = 0;
}
c->Header.LUN = iocommand.LUN_info;
c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
// Fill in Request block
c->Request = iocommand.Request;
// Fill in the scatter gather information
if (iocommand.buf_size > 0) {
temp64.val = pci_map_single(host->pdev, buff,
iocommand.buf_size,
PCI_DMA_BIDIRECTIONAL);
c->SG[0].Addr.lower = temp64.val32.lower;
c->SG[0].Addr.upper = temp64.val32.upper;
c->SG[0].Len = iocommand.buf_size;
c->SG[0].Ext = 0; // we are not chaining
}
c->waiting = &wait;
/* Put the request on the tail of the request queue */
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
addQ(&host->reqQ, c);
host->Qdepth++;
start_io(host);
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
wait_for_completion(&wait);
/* unlock the buffers from DMA */
temp64.val32.lower = c->SG[0].Addr.lower;
temp64.val32.upper = c->SG[0].Addr.upper;
pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
iocommand.buf_size,
PCI_DMA_BIDIRECTIONAL);
check_ioctl_unit_attention(host, c);
/* Copy the error information out */
iocommand.error_info = *(c->err_info);
if (copy_to_user
(argp, &iocommand, sizeof(IOCTL_Command_struct))) {
kfree(buff);
cmd_free(host, c, 0);
return -EFAULT;
}
if (iocommand.Request.Type.Direction == XFER_READ) {
/* Copy the data out of the buffer we created */
if (copy_to_user
(iocommand.buf, buff, iocommand.buf_size)) {
kfree(buff);
cmd_free(host, c, 0);
return -EFAULT;
}
}
kfree(buff);
cmd_free(host, c, 0);
return 0;
}
case CCISS_BIG_PASSTHRU:{
BIG_IOCTL_Command_struct *ioc;
CommandList_struct *c;
unsigned char **buff = NULL;
int *buff_size = NULL;
u64bit temp64;
unsigned long flags;
BYTE sg_used = 0;
int status = 0;
int i;
DECLARE_COMPLETION_ONSTACK(wait);
__u32 left;
__u32 sz;
BYTE __user *data_ptr;
if (!arg)
return -EINVAL;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
ioc = (BIG_IOCTL_Command_struct *)
kmalloc(sizeof(*ioc), GFP_KERNEL);
if (!ioc) {
status = -ENOMEM;
goto cleanup1;
}
if (copy_from_user(ioc, argp, sizeof(*ioc))) {
status = -EFAULT;
goto cleanup1;
}
if ((ioc->buf_size < 1) &&
(ioc->Request.Type.Direction != XFER_NONE)) {
status = -EINVAL;
goto cleanup1;
}
/* Check kmalloc limits using all SGs */
if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
status = -EINVAL;
goto cleanup1;
}
if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
status = -EINVAL;
goto cleanup1;
}
buff =
kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
if (!buff) {
status = -ENOMEM;
goto cleanup1;
}
buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
GFP_KERNEL);
if (!buff_size) {
status = -ENOMEM;
goto cleanup1;
}
left = ioc->buf_size;
data_ptr = ioc->buf;
while (left) {
sz = (left >
ioc->malloc_size) ? ioc->
malloc_size : left;
buff_size[sg_used] = sz;
buff[sg_used] = kmalloc(sz, GFP_KERNEL);
if (buff[sg_used] == NULL) {
status = -ENOMEM;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_WRITE) {
if (copy_from_user
(buff[sg_used], data_ptr, sz)) {
status = -EFAULT;
goto cleanup1;
}
} else {
memset(buff[sg_used], 0, sz);
}
left -= sz;
data_ptr += sz;
sg_used++;
}
if ((c = cmd_alloc(host, 0)) == NULL) {
status = -ENOMEM;
goto cleanup1;
}
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
if (ioc->buf_size > 0) {
c->Header.SGList = sg_used;
c->Header.SGTotal = sg_used;
} else {
c->Header.SGList = 0;
c->Header.SGTotal = 0;
}
c->Header.LUN = ioc->LUN_info;
c->Header.Tag.lower = c->busaddr;
c->Request = ioc->Request;
if (ioc->buf_size > 0) {
int i;
for (i = 0; i < sg_used; i++) {
temp64.val =
pci_map_single(host->pdev, buff[i],
buff_size[i],
PCI_DMA_BIDIRECTIONAL);
c->SG[i].Addr.lower =
temp64.val32.lower;
c->SG[i].Addr.upper =
temp64.val32.upper;
c->SG[i].Len = buff_size[i];
c->SG[i].Ext = 0; /* we are not chaining */
}
}
c->waiting = &wait;
/* Put the request on the tail of the request queue */
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
addQ(&host->reqQ, c);
host->Qdepth++;
start_io(host);
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
wait_for_completion(&wait);
/* unlock the buffers from DMA */
for (i = 0; i < sg_used; i++) {
temp64.val32.lower = c->SG[i].Addr.lower;
temp64.val32.upper = c->SG[i].Addr.upper;
pci_unmap_single(host->pdev,
(dma_addr_t) temp64.val, buff_size[i],
PCI_DMA_BIDIRECTIONAL);
}
check_ioctl_unit_attention(host, c);
/* Copy the error information out */
ioc->error_info = *(c->err_info);
if (copy_to_user(argp, ioc, sizeof(*ioc))) {
cmd_free(host, c, 0);
status = -EFAULT;
goto cleanup1;
}
if (ioc->Request.Type.Direction == XFER_READ) {
/* Copy the data out of the buffer we created */
BYTE __user *ptr = ioc->buf;
for (i = 0; i < sg_used; i++) {
if (copy_to_user
(ptr, buff[i], buff_size[i])) {
cmd_free(host, c, 0);
status = -EFAULT;
goto cleanup1;
}
ptr += buff_size[i];
}
}
cmd_free(host, c, 0);
status = 0;
cleanup1:
if (buff) {
for (i = 0; i < sg_used; i++)
kfree(buff[i]);
kfree(buff);
}
kfree(buff_size);
kfree(ioc);
return status;
}
/* scsi_cmd_ioctl handles these, below, though some are not */
/* very meaningful for cciss. SG_IO is the main one people want. */
case SG_GET_VERSION_NUM:
case SG_SET_TIMEOUT:
case SG_GET_TIMEOUT:
case SG_GET_RESERVED_SIZE:
case SG_SET_RESERVED_SIZE:
case SG_EMULATED_HOST:
case SG_IO:
case SCSI_IOCTL_SEND_COMMAND:
return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
/* scsi_cmd_ioctl would normally handle these, below, but */
/* they aren't a good fit for cciss, as CD-ROMs are */
/* not supported, and we don't have any bus/target/lun */
/* which we present to the kernel. */
case CDROM_SEND_PACKET:
case CDROMCLOSETRAY:
case CDROMEJECT:
case SCSI_IOCTL_GET_IDLUN:
case SCSI_IOCTL_GET_BUS_NUMBER:
default:
return -ENOTTY;
}
}
static void cciss_check_queues(ctlr_info_t *h)
{
int start_queue = h->next_to_run;
int i;
/* check to see if we have maxed out the number of commands that can
* be placed on the queue. If so then exit. We do this check here
* in case the interrupt we serviced was from an ioctl and did not
* free any new commands.
*/
if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
return;
/* We have room on the queue for more commands. Now we need to queue
* them up. We will also keep track of the next queue to run so
* that every queue gets a chance to be started first.
*/
for (i = 0; i < h->highest_lun + 1; i++) {
int curr_queue = (start_queue + i) % (h->highest_lun + 1);
/* make sure the disk has been added and the drive is real
* because this can be called from the middle of init_one.
*/
if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
continue;
blk_start_queue(h->gendisk[curr_queue]->queue);
/* check to see if we have maxed out the number of commands
* that can be placed on the queue.
*/
if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
if (curr_queue == start_queue) {
h->next_to_run =
(start_queue + 1) % (h->highest_lun + 1);
break;
} else {
h->next_to_run = curr_queue;
break;
}
}
}
}
static void cciss_softirq_done(struct request *rq)
{
CommandList_struct *cmd = rq->completion_data;
ctlr_info_t *h = hba[cmd->ctlr];
unsigned long flags;
u64bit temp64;
int i, ddir;
if (cmd->Request.Type.Direction == XFER_READ)
ddir = PCI_DMA_FROMDEVICE;
else
ddir = PCI_DMA_TODEVICE;
/* command did not need to be retried */
/* unmap the DMA mapping for all the scatter gather elements */
for (i = 0; i < cmd->Header.SGList; i++) {
temp64.val32.lower = cmd->SG[i].Addr.lower;
temp64.val32.upper = cmd->SG[i].Addr.upper;
pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
}
#ifdef CCISS_DEBUG
printk("Done with %p\n", rq);
#endif /* CCISS_DEBUG */
/* set the residual count for pc requests */
if (blk_pc_request(rq))
rq->resid_len = cmd->err_info->ResidualCnt;
blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
spin_lock_irqsave(&h->lock, flags);
cmd_free(h, cmd, 1);
cciss_check_queues(h);
spin_unlock_irqrestore(&h->lock, flags);
}
static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
uint32_t log_unit)
{
log_unit = h->drv[log_unit].LunID & 0x03fff;
memset(&scsi3addr[4], 0, 4);
memcpy(&scsi3addr[0], &log_unit, 4);
scsi3addr[3] |= 0x40;
}
/* This function gets the SCSI vendor, model, and revision of a logical drive
* via the inquiry page 0. Model, vendor, and rev are set to empty strings if
* they cannot be read.
*/
static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
char *vendor, char *model, char *rev)
{
int rc;
InquiryData_struct *inq_buf;
unsigned char scsi3addr[8];
*vendor = '\0';
*model = '\0';
*rev = '\0';
inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
if (!inq_buf)
return;
log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
if (withirq)
rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
sizeof(InquiryData_struct), 0,
scsi3addr, TYPE_CMD);
else
rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
sizeof(InquiryData_struct), 0,
scsi3addr, TYPE_CMD);
if (rc == IO_OK) {
memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
vendor[VENDOR_LEN] = '\0';
memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
model[MODEL_LEN] = '\0';
memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
rev[REV_LEN] = '\0';
}
kfree(inq_buf);
return;
}
/* This function gets the serial number of a logical drive via
* inquiry page 0x83. Serial no. is 16 bytes. If the serial
* number cannot be had, for whatever reason, 16 bytes of 0xff
* are returned instead.
*/
static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
unsigned char *serial_no, int buflen)
{
#define PAGE_83_INQ_BYTES 64
int rc;
unsigned char *buf;
unsigned char scsi3addr[8];
if (buflen > 16)
buflen = 16;
memset(serial_no, 0xff, buflen);
buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
if (!buf)
return;
memset(serial_no, 0, buflen);
log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
if (withirq)
rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
else
rc = sendcmd(CISS_INQUIRY, ctlr, buf,
PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
if (rc == IO_OK)
memcpy(serial_no, &buf[8], buflen);
kfree(buf);
return;
}
static void cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
int drv_index)
{
disk->queue = blk_init_queue(do_cciss_request, &h->lock);
sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
disk->major = h->major;
disk->first_minor = drv_index << NWD_SHIFT;
disk->fops = &cciss_fops;
disk->private_data = &h->drv[drv_index];
disk->driverfs_dev = &h->drv[drv_index].dev;
/* Set up queue information */
blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
/* This is a hardware imposed limit. */
blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
/* This is a limit in the driver and could be eliminated. */
blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
blk_queue_softirq_done(disk->queue, cciss_softirq_done);
disk->queue->queuedata = h;
blk_queue_logical_block_size(disk->queue,
h->drv[drv_index].block_size);
/* Make sure all queue data is written out before */
/* setting h->drv[drv_index].queue, as setting this */
/* allows the interrupt handler to start the queue */
wmb();
h->drv[drv_index].queue = disk->queue;
add_disk(disk);
}
/* This function will check the usage_count of the drive to be updated/added.
* If the usage_count is zero and it is a heretofore unknown drive, or,
* the drive's capacity, geometry, or serial number has changed,
* then the drive information will be updated and the disk will be
* re-registered with the kernel. If these conditions don't hold,
* then it will be left alone for the next reboot. The exception to this
* is disk 0 which will always be left registered with the kernel since it
* is also the controller node. Any changes to disk 0 will show up on
* the next reboot.
*/
static void cciss_update_drive_info(int ctlr, int drv_index, int first_time)
{
ctlr_info_t *h = hba[ctlr];
struct gendisk *disk;
InquiryData_struct *inq_buff = NULL;
unsigned int block_size;
sector_t total_size;
unsigned long flags = 0;
int ret = 0;
drive_info_struct *drvinfo;
int was_only_controller_node;
/* Get information about the disk and modify the driver structure */
inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
if (inq_buff == NULL || drvinfo == NULL)
goto mem_msg;
/* See if we're trying to update the "controller node"
* this will happen the when the first logical drive gets
* created by ACU.
*/
was_only_controller_node = (drv_index == 0 &&
h->drv[0].raid_level == -1);
/* testing to see if 16-byte CDBs are already being used */
if (h->cciss_read == CCISS_READ_16) {
cciss_read_capacity_16(h->ctlr, drv_index, 1,
&total_size, &block_size);
} else {
cciss_read_capacity(ctlr, drv_index, 1,
&total_size, &block_size);
/* if read_capacity returns all F's this volume is >2TB */
/* in size so we switch to 16-byte CDB's for all */
/* read/write ops */
if (total_size == 0xFFFFFFFFULL) {
cciss_read_capacity_16(ctlr, drv_index, 1,
&total_size, &block_size);
h->cciss_read = CCISS_READ_16;
h->cciss_write = CCISS_WRITE_16;
} else {
h->cciss_read = CCISS_READ_10;
h->cciss_write = CCISS_WRITE_10;
}
}
cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
inq_buff, drvinfo);
drvinfo->block_size = block_size;
drvinfo->nr_blocks = total_size + 1;
cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
drvinfo->model, drvinfo->rev);
cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
sizeof(drvinfo->serial_no));
/* Is it the same disk we already know, and nothing's changed? */
if (h->drv[drv_index].raid_level != -1 &&
((memcmp(drvinfo->serial_no,
h->drv[drv_index].serial_no, 16) == 0) &&
drvinfo->block_size == h->drv[drv_index].block_size &&
drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
drvinfo->heads == h->drv[drv_index].heads &&
drvinfo->sectors == h->drv[drv_index].sectors &&
drvinfo->cylinders == h->drv[drv_index].cylinders))
/* The disk is unchanged, nothing to update */
goto freeret;
/* If we get here it's not the same disk, or something's changed,
* so we need to * deregister it, and re-register it, if it's not
* in use.
* If the disk already exists then deregister it before proceeding
* (unless it's the first disk (for the controller node).
*/
if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
printk(KERN_WARNING "disk %d has changed.\n", drv_index);
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
h->drv[drv_index].busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
/* deregister_disk sets h->drv[drv_index].queue = NULL
* which keeps the interrupt handler from starting
* the queue.
*/
ret = deregister_disk(h, drv_index, 0);
h->drv[drv_index].busy_configuring = 0;
}
/* If the disk is in use return */
if (ret)
goto freeret;
/* Save the new information from cciss_geometry_inquiry
* and serial number inquiry.
*/
h->drv[drv_index].block_size = drvinfo->block_size;
h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
h->drv[drv_index].heads = drvinfo->heads;
h->drv[drv_index].sectors = drvinfo->sectors;
h->drv[drv_index].cylinders = drvinfo->cylinders;
h->drv[drv_index].raid_level = drvinfo->raid_level;
memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
++h->num_luns;
disk = h->gendisk[drv_index];
set_capacity(disk, h->drv[drv_index].nr_blocks);
/* If it's not disk 0 (drv_index != 0)
* or if it was disk 0, but there was previously
* no actual corresponding configured logical drive
* (raid_leve == -1) then we want to update the
* logical drive's information.
*/
if (drv_index || first_time)
cciss_add_disk(h, disk, drv_index);
freeret:
kfree(inq_buff);
kfree(drvinfo);
return;
mem_msg:
printk(KERN_ERR "cciss: out of memory\n");
goto freeret;
}
/* This function will find the first index of the controllers drive array
* that has a -1 for the raid_level and will return that index. This is
* where new drives will be added. If the index to be returned is greater
* than the highest_lun index for the controller then highest_lun is set
* to this new index. If there are no available indexes then -1 is returned.
* "controller_node" is used to know if this is a real logical drive, or just
* the controller node, which determines if this counts towards highest_lun.
*/
static int cciss_find_free_drive_index(int ctlr, int controller_node)
{
int i;
for (i = 0; i < CISS_MAX_LUN; i++) {
if (hba[ctlr]->drv[i].raid_level == -1) {
if (i > hba[ctlr]->highest_lun)
if (!controller_node)
hba[ctlr]->highest_lun = i;
return i;
}
}
return -1;
}
/* cciss_add_gendisk finds a free hba[]->drv structure
* and allocates a gendisk if needed, and sets the lunid
* in the drvinfo structure. It returns the index into
* the ->drv[] array, or -1 if none are free.
* is_controller_node indicates whether highest_lun should
* count this disk, or if it's only being added to provide
* a means to talk to the controller in case no logical
* drives have yet been configured.
*/
static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
{
int drv_index;
drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
if (drv_index == -1)
return -1;
/*Check if the gendisk needs to be allocated */
if (!h->gendisk[drv_index]) {
h->gendisk[drv_index] =
alloc_disk(1 << NWD_SHIFT);
if (!h->gendisk[drv_index]) {
printk(KERN_ERR "cciss%d: could not "
"allocate a new disk %d\n",
h->ctlr, drv_index);
return -1;
}
}
h->drv[drv_index].LunID = lunid;
if (cciss_create_ld_sysfs_entry(h, &h->drv[drv_index], drv_index))
goto err_free_disk;
/* Don't need to mark this busy because nobody */
/* else knows about this disk yet to contend */
/* for access to it. */
h->drv[drv_index].busy_configuring = 0;
wmb();
return drv_index;
err_free_disk:
put_disk(h->gendisk[drv_index]);
h->gendisk[drv_index] = NULL;
return -1;
}
/* This is for the special case of a controller which
* has no logical drives. In this case, we still need
* to register a disk so the controller can be accessed
* by the Array Config Utility.
*/
static void cciss_add_controller_node(ctlr_info_t *h)
{
struct gendisk *disk;
int drv_index;
if (h->gendisk[0] != NULL) /* already did this? Then bail. */
return;
drv_index = cciss_add_gendisk(h, 0, 1);
if (drv_index == -1) {
printk(KERN_WARNING "cciss%d: could not "
"add disk 0.\n", h->ctlr);
return;
}
h->drv[drv_index].block_size = 512;
h->drv[drv_index].nr_blocks = 0;
h->drv[drv_index].heads = 0;
h->drv[drv_index].sectors = 0;
h->drv[drv_index].cylinders = 0;
h->drv[drv_index].raid_level = -1;
memset(h->drv[drv_index].serial_no, 0, 16);
disk = h->gendisk[drv_index];
cciss_add_disk(h, disk, drv_index);
}
/* This function will add and remove logical drives from the Logical
* drive array of the controller and maintain persistency of ordering
* so that mount points are preserved until the next reboot. This allows
* for the removal of logical drives in the middle of the drive array
* without a re-ordering of those drives.
* INPUT
* h = The controller to perform the operations on
*/
static int rebuild_lun_table(ctlr_info_t *h, int first_time)
{
int ctlr = h->ctlr;
int num_luns;
ReportLunData_struct *ld_buff = NULL;
int return_code;
int listlength = 0;
int i;
int drv_found;
int drv_index = 0;
__u32 lunid = 0;
unsigned long flags;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
/* Set busy_configuring flag for this operation */
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
if (h->busy_configuring) {
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return -EBUSY;
}
h->busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
if (ld_buff == NULL)
goto mem_msg;
return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
sizeof(ReportLunData_struct),
0, CTLR_LUNID, TYPE_CMD);
if (return_code == IO_OK)
listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
else { /* reading number of logical volumes failed */
printk(KERN_WARNING "cciss: report logical volume"
" command failed\n");
listlength = 0;
goto freeret;
}
num_luns = listlength / 8; /* 8 bytes per entry */
if (num_luns > CISS_MAX_LUN) {
num_luns = CISS_MAX_LUN;
printk(KERN_WARNING "cciss: more luns configured"
" on controller than can be handled by"
" this driver.\n");
}
if (num_luns == 0)
cciss_add_controller_node(h);
/* Compare controller drive array to driver's drive array
* to see if any drives are missing on the controller due
* to action of Array Config Utility (user deletes drive)
* and deregister logical drives which have disappeared.
*/
for (i = 0; i <= h->highest_lun; i++) {
int j;
drv_found = 0;
/* skip holes in the array from already deleted drives */
if (h->drv[i].raid_level == -1)
continue;
for (j = 0; j < num_luns; j++) {
memcpy(&lunid, &ld_buff->LUN[j][0], 4);
lunid = le32_to_cpu(lunid);
if (h->drv[i].LunID == lunid) {
drv_found = 1;
break;
}
}
if (!drv_found) {
/* Deregister it from the OS, it's gone. */
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
h->drv[i].busy_configuring = 1;
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return_code = deregister_disk(h, i, 1);
cciss_destroy_ld_sysfs_entry(&h->drv[i]);
h->drv[i].busy_configuring = 0;
}
}
/* Compare controller drive array to driver's drive array.
* Check for updates in the drive information and any new drives
* on the controller due to ACU adding logical drives, or changing
* a logical drive's size, etc. Reregister any new/changed drives
*/
for (i = 0; i < num_luns; i++) {
int j;
drv_found = 0;
memcpy(&lunid, &ld_buff->LUN[i][0], 4);
lunid = le32_to_cpu(lunid);
/* Find if the LUN is already in the drive array
* of the driver. If so then update its info
* if not in use. If it does not exist then find
* the first free index and add it.
*/
for (j = 0; j <= h->highest_lun; j++) {
if (h->drv[j].raid_level != -1 &&
h->drv[j].LunID == lunid) {
drv_index = j;
drv_found = 1;
break;
}
}
/* check if the drive was found already in the array */
if (!drv_found) {
drv_index = cciss_add_gendisk(h, lunid, 0);
if (drv_index == -1)
goto freeret;
}
cciss_update_drive_info(ctlr, drv_index, first_time);
} /* end for */
freeret:
kfree(ld_buff);
h->busy_configuring = 0;
/* We return -1 here to tell the ACU that we have registered/updated
* all of the drives that we can and to keep it from calling us
* additional times.
*/
return -1;
mem_msg:
printk(KERN_ERR "cciss: out of memory\n");
h->busy_configuring = 0;
goto freeret;
}
/* This function will deregister the disk and it's queue from the
* kernel. It must be called with the controller lock held and the
* drv structures busy_configuring flag set. It's parameters are:
*
* disk = This is the disk to be deregistered
* drv = This is the drive_info_struct associated with the disk to be
* deregistered. It contains information about the disk used
* by the driver.
* clear_all = This flag determines whether or not the disk information
* is going to be completely cleared out and the highest_lun
* reset. Sometimes we want to clear out information about
* the disk in preparation for re-adding it. In this case
* the highest_lun should be left unchanged and the LunID
* should not be cleared.
*/
static int deregister_disk(ctlr_info_t *h, int drv_index,
int clear_all)
{
int i;
struct gendisk *disk;
drive_info_struct *drv;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
drv = &h->drv[drv_index];
disk = h->gendisk[drv_index];
/* make sure logical volume is NOT is use */
if (clear_all || (h->gendisk[0] == disk)) {
if (drv->usage_count > 1)
return -EBUSY;
} else if (drv->usage_count > 0)
return -EBUSY;
/* invalidate the devices and deregister the disk. If it is disk
* zero do not deregister it but just zero out it's values. This
* allows us to delete disk zero but keep the controller registered.
*/
if (h->gendisk[0] != disk) {
struct request_queue *q = disk->queue;
if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
if (q) {
blk_cleanup_queue(q);
/* Set drv->queue to NULL so that we do not try
* to call blk_start_queue on this queue in the
* interrupt handler
*/
drv->queue = NULL;
}
/* If clear_all is set then we are deleting the logical
* drive, not just refreshing its info. For drives
* other than disk 0 we will call put_disk. We do not
* do this for disk 0 as we need it to be able to
* configure the controller.
*/
if (clear_all){
/* This isn't pretty, but we need to find the
* disk in our array and NULL our the pointer.
* This is so that we will call alloc_disk if
* this index is used again later.
*/
for (i=0; i < CISS_MAX_LUN; i++){
if (h->gendisk[i] == disk) {
h->gendisk[i] = NULL;
break;
}
}
put_disk(disk);
}
} else {
set_capacity(disk, 0);
}
--h->num_luns;
/* zero out the disk size info */
drv->nr_blocks = 0;
drv->block_size = 0;
drv->heads = 0;
drv->sectors = 0;
drv->cylinders = 0;
drv->raid_level = -1; /* This can be used as a flag variable to
* indicate that this element of the drive
* array is free.
*/
if (clear_all) {
/* check to see if it was the last disk */
if (drv == h->drv + h->highest_lun) {
/* if so, find the new hightest lun */
int i, newhighest = -1;
for (i = 0; i <= h->highest_lun; i++) {
/* if the disk has size > 0, it is available */
if (h->drv[i].heads)
newhighest = i;
}
h->highest_lun = newhighest;
}
drv->LunID = 0;
}
return 0;
}
static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
size_t size, __u8 page_code, unsigned char *scsi3addr,
int cmd_type)
{
ctlr_info_t *h = hba[ctlr];
u64bit buff_dma_handle;
int status = IO_OK;
c->cmd_type = CMD_IOCTL_PEND;
c->Header.ReplyQueue = 0;
if (buff != NULL) {
c->Header.SGList = 1;
c->Header.SGTotal = 1;
} else {
c->Header.SGList = 0;
c->Header.SGTotal = 0;
}
c->Header.Tag.lower = c->busaddr;
memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
c->Request.Type.Type = cmd_type;
if (cmd_type == TYPE_CMD) {
switch (cmd) {
case CISS_INQUIRY:
/* are we trying to read a vital product page */
if (page_code != 0) {
c->Request.CDB[1] = 0x01;
c->Request.CDB[2] = page_code;
}
c->Request.CDBLen = 6;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ;
c->Request.Timeout = 0;
c->Request.CDB[0] = CISS_INQUIRY;
c->Request.CDB[4] = size & 0xFF;
break;
case CISS_REPORT_LOG:
case CISS_REPORT_PHYS:
/* Talking to controller so It's a physical command
mode = 00 target = 0. Nothing to write.
*/
c->Request.CDBLen = 12;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd;
c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
c->Request.CDB[7] = (size >> 16) & 0xFF;
c->Request.CDB[8] = (size >> 8) & 0xFF;
c->Request.CDB[9] = size & 0xFF;
break;
case CCISS_READ_CAPACITY:
c->Request.CDBLen = 10;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd;
break;
case CCISS_READ_CAPACITY_16:
c->Request.CDBLen = 16;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_READ;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd;
c->Request.CDB[1] = 0x10;
c->Request.CDB[10] = (size >> 24) & 0xFF;
c->Request.CDB[11] = (size >> 16) & 0xFF;
c->Request.CDB[12] = (size >> 8) & 0xFF;
c->Request.CDB[13] = size & 0xFF;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd;
break;
case CCISS_CACHE_FLUSH:
c->Request.CDBLen = 12;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_WRITE;
c->Request.Timeout = 0;
c->Request.CDB[0] = BMIC_WRITE;
c->Request.CDB[6] = BMIC_CACHE_FLUSH;
break;
case TEST_UNIT_READY:
c->Request.CDBLen = 6;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_NONE;
c->Request.Timeout = 0;
break;
default:
printk(KERN_WARNING
"cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
return IO_ERROR;
}
} else if (cmd_type == TYPE_MSG) {
switch (cmd) {
case 0: /* ABORT message */
c->Request.CDBLen = 12;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_WRITE;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd; /* abort */
c->Request.CDB[1] = 0; /* abort a command */
/* buff contains the tag of the command to abort */
memcpy(&c->Request.CDB[4], buff, 8);
break;
case 1: /* RESET message */
c->Request.CDBLen = 16;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_NONE;
c->Request.Timeout = 0;
memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
c->Request.CDB[0] = cmd; /* reset */
c->Request.CDB[1] = 0x03; /* reset a target */
break;
case 3: /* No-Op message */
c->Request.CDBLen = 1;
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction = XFER_WRITE;
c->Request.Timeout = 0;
c->Request.CDB[0] = cmd;
break;
default:
printk(KERN_WARNING
"cciss%d: unknown message type %d\n", ctlr, cmd);
return IO_ERROR;
}
} else {
printk(KERN_WARNING
"cciss%d: unknown command type %d\n", ctlr, cmd_type);
return IO_ERROR;
}
/* Fill in the scatter gather information */
if (size > 0) {
buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
buff, size,
PCI_DMA_BIDIRECTIONAL);
c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
c->SG[0].Len = size;
c->SG[0].Ext = 0; /* we are not chaining */
}
return status;
}
static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
{
switch (c->err_info->ScsiStatus) {
case SAM_STAT_GOOD:
return IO_OK;
case SAM_STAT_CHECK_CONDITION:
switch (0xf & c->err_info->SenseInfo[2]) {
case 0: return IO_OK; /* no sense */
case 1: return IO_OK; /* recovered error */
default:
printk(KERN_WARNING "cciss%d: cmd 0x%02x "
"check condition, sense key = 0x%02x\n",
h->ctlr, c->Request.CDB[0],
c->err_info->SenseInfo[2]);
}
break;
default:
printk(KERN_WARNING "cciss%d: cmd 0x%02x"
"scsi status = 0x%02x\n", h->ctlr,
c->Request.CDB[0], c->err_info->ScsiStatus);
break;
}
return IO_ERROR;
}
static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
{
int return_status = IO_OK;
if (c->err_info->CommandStatus == CMD_SUCCESS)
return IO_OK;
switch (c->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
return_status = check_target_status(h, c);
break;
case CMD_DATA_UNDERRUN:
case CMD_DATA_OVERRUN:
/* expected for inquiry and report lun commands */
break;
case CMD_INVALID:
printk(KERN_WARNING "cciss: cmd 0x%02x is "
"reported invalid\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_PROTOCOL_ERR:
printk(KERN_WARNING "cciss: cmd 0x%02x has "
"protocol error \n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_HARDWARE_ERR:
printk(KERN_WARNING "cciss: cmd 0x%02x had "
" hardware error\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_CONNECTION_LOST:
printk(KERN_WARNING "cciss: cmd 0x%02x had "
"connection lost\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_ABORTED:
printk(KERN_WARNING "cciss: cmd 0x%02x was "
"aborted\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_ABORT_FAILED:
printk(KERN_WARNING "cciss: cmd 0x%02x reports "
"abort failed\n", c->Request.CDB[0]);
return_status = IO_ERROR;
break;
case CMD_UNSOLICITED_ABORT:
printk(KERN_WARNING
"cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
c->Request.CDB[0]);
return_status = IO_NEEDS_RETRY;
break;
default:
printk(KERN_WARNING "cciss: cmd 0x%02x returned "
"unknown status %x\n", c->Request.CDB[0],
c->err_info->CommandStatus);
return_status = IO_ERROR;
}
return return_status;
}
static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
int attempt_retry)
{
DECLARE_COMPLETION_ONSTACK(wait);
u64bit buff_dma_handle;
unsigned long flags;
int return_status = IO_OK;
resend_cmd2:
c->waiting = &wait;
/* Put the request on the tail of the queue and send it */
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
addQ(&h->reqQ, c);
h->Qdepth++;
start_io(h);
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
wait_for_completion(&wait);
if (c->err_info->CommandStatus == 0 || !attempt_retry)
goto command_done;
return_status = process_sendcmd_error(h, c);
if (return_status == IO_NEEDS_RETRY &&
c->retry_count < MAX_CMD_RETRIES) {
printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
c->Request.CDB[0]);
c->retry_count++;
/* erase the old error information */
memset(c->err_info, 0, sizeof(ErrorInfo_struct));
return_status = IO_OK;
INIT_COMPLETION(wait);
goto resend_cmd2;
}
command_done:
/* unlock the buffers from DMA */
buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
return return_status;
}
static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char scsi3addr[],
int cmd_type)
{
ctlr_info_t *h = hba[ctlr];
CommandList_struct *c;
int return_status;
c = cmd_alloc(h, 0);
if (!c)
return -ENOMEM;
return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
scsi3addr, cmd_type);
if (return_status == IO_OK)
return_status = sendcmd_withirq_core(h, c, 1);
cmd_free(h, c, 0);
return return_status;
}
static void cciss_geometry_inquiry(int ctlr, int logvol,
int withirq, sector_t total_size,
unsigned int block_size,
InquiryData_struct *inq_buff,
drive_info_struct *drv)
{
int return_code;
unsigned long t;
unsigned char scsi3addr[8];
memset(inq_buff, 0, sizeof(InquiryData_struct));
log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
if (withirq)
return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
inq_buff, sizeof(*inq_buff),
0xC1, scsi3addr, TYPE_CMD);
else
return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
sizeof(*inq_buff), 0xC1, scsi3addr,
TYPE_CMD);
if (return_code == IO_OK) {
if (inq_buff->data_byte[8] == 0xFF) {
printk(KERN_WARNING
"cciss: reading geometry failed, volume "
"does not support reading geometry\n");
drv->heads = 255;
drv->sectors = 32; // Sectors per track
drv->cylinders = total_size + 1;
drv->raid_level = RAID_UNKNOWN;
} else {
drv->heads = inq_buff->data_byte[6];
drv->sectors = inq_buff->data_byte[7];
drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
drv->cylinders += inq_buff->data_byte[5];
drv->raid_level = inq_buff->data_byte[8];
}
drv->block_size = block_size;
drv->nr_blocks = total_size + 1;
t = drv->heads * drv->sectors;
if (t > 1) {
sector_t real_size = total_size + 1;
unsigned long rem = sector_div(real_size, t);
if (rem)
real_size++;
drv->cylinders = real_size;
}
} else { /* Get geometry failed */
printk(KERN_WARNING "cciss: reading geometry failed\n");
}
printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
drv->heads, drv->sectors, drv->cylinders);
}
static void
cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
unsigned int *block_size)
{
ReadCapdata_struct *buf;
int return_code;
unsigned char scsi3addr[8];
buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
if (!buf) {
printk(KERN_WARNING "cciss: out of memory\n");
return;
}
log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
if (withirq)
return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
ctlr, buf, sizeof(ReadCapdata_struct),
0, scsi3addr, TYPE_CMD);
else
return_code = sendcmd(CCISS_READ_CAPACITY,
ctlr, buf, sizeof(ReadCapdata_struct),
0, scsi3addr, TYPE_CMD);
if (return_code == IO_OK) {
*total_size = be32_to_cpu(*(__be32 *) buf->total_size);
*block_size = be32_to_cpu(*(__be32 *) buf->block_size);
} else { /* read capacity command failed */
printk(KERN_WARNING "cciss: read capacity failed\n");
*total_size = 0;
*block_size = BLOCK_SIZE;
}
if (*total_size != 0)
printk(KERN_INFO " blocks= %llu block_size= %d\n",
(unsigned long long)*total_size+1, *block_size);
kfree(buf);
}
static void
cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
{
ReadCapdata_struct_16 *buf;
int return_code;
unsigned char scsi3addr[8];
buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
if (!buf) {
printk(KERN_WARNING "cciss: out of memory\n");
return;
}
log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
if (withirq) {
return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
ctlr, buf, sizeof(ReadCapdata_struct_16),
0, scsi3addr, TYPE_CMD);
}
else {
return_code = sendcmd(CCISS_READ_CAPACITY_16,
ctlr, buf, sizeof(ReadCapdata_struct_16),
0, scsi3addr, TYPE_CMD);
}
if (return_code == IO_OK) {
*total_size = be64_to_cpu(*(__be64 *) buf->total_size);
*block_size = be32_to_cpu(*(__be32 *) buf->block_size);
} else { /* read capacity command failed */
printk(KERN_WARNING "cciss: read capacity failed\n");
*total_size = 0;
*block_size = BLOCK_SIZE;
}
printk(KERN_INFO " blocks= %llu block_size= %d\n",
(unsigned long long)*total_size+1, *block_size);
kfree(buf);
}
static int cciss_revalidate(struct gendisk *disk)
{
ctlr_info_t *h = get_host(disk);
drive_info_struct *drv = get_drv(disk);
int logvol;
int FOUND = 0;
unsigned int block_size;
sector_t total_size;
InquiryData_struct *inq_buff = NULL;
for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
if (h->drv[logvol].LunID == drv->LunID) {
FOUND = 1;
break;
}
}
if (!FOUND)
return 1;
inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
if (inq_buff == NULL) {
printk(KERN_WARNING "cciss: out of memory\n");
return 1;
}
if (h->cciss_read == CCISS_READ_10) {
cciss_read_capacity(h->ctlr, logvol, 1,
&total_size, &block_size);
} else {
cciss_read_capacity_16(h->ctlr, logvol, 1,
&total_size, &block_size);
}
cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
inq_buff, drv);
blk_queue_logical_block_size(drv->queue, drv->block_size);
set_capacity(disk, drv->nr_blocks);
kfree(inq_buff);
return 0;
}
/*
* Wait polling for a command to complete.
* The memory mapped FIFO is polled for the completion.
* Used only at init time, interrupts from the HBA are disabled.
*/
static unsigned long pollcomplete(int ctlr)
{
unsigned long done;
int i;
/* Wait (up to 20 seconds) for a command to complete */
for (i = 20 * HZ; i > 0; i--) {
done = hba[ctlr]->access.command_completed(hba[ctlr]);
if (done == FIFO_EMPTY)
schedule_timeout_uninterruptible(1);
else
return done;
}
/* Invalid address to tell caller we ran out of time */
return 1;
}
/* Send command c to controller h and poll for it to complete.
* Turns interrupts off on the board. Used at driver init time
* and during SCSI error recovery.
*/
static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
{
int i;
unsigned long complete;
int status = IO_ERROR;
u64bit buff_dma_handle;
resend_cmd1:
/* Disable interrupt on the board. */
h->access.set_intr_mask(h, CCISS_INTR_OFF);
/* Make sure there is room in the command FIFO */
/* Actually it should be completely empty at this time */
/* unless we are in here doing error handling for the scsi */
/* tape side of the driver. */
for (i = 200000; i > 0; i--) {
/* if fifo isn't full go */
if (!(h->access.fifo_full(h)))
break;
udelay(10);
printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
" waiting!\n", h->ctlr);
}
h->access.submit_command(h, c); /* Send the cmd */
do {
complete = pollcomplete(h->ctlr);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss: command completed\n");
#endif /* CCISS_DEBUG */
if (complete == 1) {
printk(KERN_WARNING
"cciss cciss%d: SendCmd Timeout out, "
"No command list address returned!\n", h->ctlr);
status = IO_ERROR;
break;
}
/* Make sure it's the command we're expecting. */
if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
printk(KERN_WARNING "cciss%d: Unexpected command "
"completion.\n", h->ctlr);
continue;
}
/* It is our command. If no error, we're done. */
if (!(complete & CISS_ERROR_BIT)) {
status = IO_OK;
break;
}
/* There is an error... */
/* if data overrun or underun on Report command ignore it */
if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
(c->Request.CDB[0] == CISS_REPORT_PHYS) ||
(c->Request.CDB[0] == CISS_INQUIRY)) &&
((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
(c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
complete = c->busaddr;
status = IO_OK;
break;
}
if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
h->ctlr, c);
if (c->retry_count < MAX_CMD_RETRIES) {
printk(KERN_WARNING "cciss%d: retrying %p\n",
h->ctlr, c);
c->retry_count++;
/* erase the old error information */
memset(c->err_info, 0, sizeof(c->err_info));
goto resend_cmd1;
}
printk(KERN_WARNING "cciss%d: retried %p too many "
"times\n", h->ctlr, c);
status = IO_ERROR;
break;
}
if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
printk(KERN_WARNING "cciss%d: command could not be "
"aborted.\n", h->ctlr);
status = IO_ERROR;
break;
}
if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
status = check_target_status(h, c);
break;
}
printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
c->Request.CDB[0], c->err_info->CommandStatus);
status = IO_ERROR;
break;
} while (1);
/* unlock the data buffer from DMA */
buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
return status;
}
/*
* Send a command to the controller, and wait for it to complete.
* Used at init time, and during SCSI error recovery.
*/
static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
__u8 page_code, unsigned char *scsi3addr, int cmd_type)
{
CommandList_struct *c;
int status;
c = cmd_alloc(hba[ctlr], 1);
if (!c) {
printk(KERN_WARNING "cciss: unable to get memory");
return IO_ERROR;
}
status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
scsi3addr, cmd_type);
if (status == IO_OK)
status = sendcmd_core(hba[ctlr], c);
cmd_free(hba[ctlr], c, 1);
return status;
}
/*
* Map (physical) PCI mem into (virtual) kernel space
*/
static void __iomem *remap_pci_mem(ulong base, ulong size)
{
ulong page_base = ((ulong) base) & PAGE_MASK;
ulong page_offs = ((ulong) base) - page_base;
void __iomem *page_remapped = ioremap(page_base, page_offs + size);
return page_remapped ? (page_remapped + page_offs) : NULL;
}
/*
* Takes jobs of the Q and sends them to the hardware, then puts it on
* the Q to wait for completion.
*/
static void start_io(ctlr_info_t *h)
{
CommandList_struct *c;
while (!hlist_empty(&h->reqQ)) {
c = hlist_entry(h->reqQ.first, CommandList_struct, list);
/* can't do anything if fifo is full */
if ((h->access.fifo_full(h))) {
printk(KERN_WARNING "cciss: fifo full\n");
break;
}
/* Get the first entry from the Request Q */
removeQ(c);
h->Qdepth--;
/* Tell the controller execute command */
h->access.submit_command(h, c);
/* Put job onto the completed Q */
addQ(&h->cmpQ, c);
}
}
/* Assumes that CCISS_LOCK(h->ctlr) is held. */
/* Zeros out the error record and then resends the command back */
/* to the controller */
static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
{
/* erase the old error information */
memset(c->err_info, 0, sizeof(ErrorInfo_struct));
/* add it to software queue and then send it to the controller */
addQ(&h->reqQ, c);
h->Qdepth++;
if (h->Qdepth > h->maxQsinceinit)
h->maxQsinceinit = h->Qdepth;
start_io(h);
}
static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
unsigned int msg_byte, unsigned int host_byte,
unsigned int driver_byte)
{
/* inverse of macros in scsi.h */
return (scsi_status_byte & 0xff) |
((msg_byte & 0xff) << 8) |
((host_byte & 0xff) << 16) |
((driver_byte & 0xff) << 24);
}
static inline int evaluate_target_status(ctlr_info_t *h,
CommandList_struct *cmd, int *retry_cmd)
{
unsigned char sense_key;
unsigned char status_byte, msg_byte, host_byte, driver_byte;
int error_value;
*retry_cmd = 0;
/* If we get in here, it means we got "target status", that is, scsi status */
status_byte = cmd->err_info->ScsiStatus;
driver_byte = DRIVER_OK;
msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
if (blk_pc_request(cmd->rq))
host_byte = DID_PASSTHROUGH;
else
host_byte = DID_OK;
error_value = make_status_bytes(status_byte, msg_byte,
host_byte, driver_byte);
if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
if (!blk_pc_request(cmd->rq))
printk(KERN_WARNING "cciss: cmd %p "
"has SCSI Status 0x%x\n",
cmd, cmd->err_info->ScsiStatus);
return error_value;
}
/* check the sense key */
sense_key = 0xf & cmd->err_info->SenseInfo[2];
/* no status or recovered error */
if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
error_value = 0;
if (check_for_unit_attention(h, cmd)) {
*retry_cmd = !blk_pc_request(cmd->rq);
return 0;
}
if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
if (error_value != 0)
printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
" sense key = 0x%x\n", cmd, sense_key);
return error_value;
}
/* SG_IO or similar, copy sense data back */
if (cmd->rq->sense) {
if (cmd->rq->sense_len > cmd->err_info->SenseLen)
cmd->rq->sense_len = cmd->err_info->SenseLen;
memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
cmd->rq->sense_len);
} else
cmd->rq->sense_len = 0;
return error_value;
}
/* checks the status of the job and calls complete buffers to mark all
* buffers for the completed job. Note that this function does not need
* to hold the hba/queue lock.
*/
static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
int timeout)
{
int retry_cmd = 0;
struct request *rq = cmd->rq;
rq->errors = 0;
if (timeout)
rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
goto after_error_processing;
switch (cmd->err_info->CommandStatus) {
case CMD_TARGET_STATUS:
rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
break;
case CMD_DATA_UNDERRUN:
if (blk_fs_request(cmd->rq)) {
printk(KERN_WARNING "cciss: cmd %p has"
" completed with data underrun "
"reported\n", cmd);
cmd->rq->resid_len = cmd->err_info->ResidualCnt;
}
break;
case CMD_DATA_OVERRUN:
if (blk_fs_request(cmd->rq))
printk(KERN_WARNING "cciss: cmd %p has"
" completed with data overrun "
"reported\n", cmd);
break;
case CMD_INVALID:
printk(KERN_WARNING "cciss: cmd %p is "
"reported invalid\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_PROTOCOL_ERR:
printk(KERN_WARNING "cciss: cmd %p has "
"protocol error \n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_HARDWARE_ERR:
printk(KERN_WARNING "cciss: cmd %p had "
" hardware error\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_CONNECTION_LOST:
printk(KERN_WARNING "cciss: cmd %p had "
"connection lost\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_ABORTED:
printk(KERN_WARNING "cciss: cmd %p was "
"aborted\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_ABORT_FAILED:
printk(KERN_WARNING "cciss: cmd %p reports "
"abort failed\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
case CMD_UNSOLICITED_ABORT:
printk(KERN_WARNING "cciss%d: unsolicited "
"abort %p\n", h->ctlr, cmd);
if (cmd->retry_count < MAX_CMD_RETRIES) {
retry_cmd = 1;
printk(KERN_WARNING
"cciss%d: retrying %p\n", h->ctlr, cmd);
cmd->retry_count++;
} else
printk(KERN_WARNING
"cciss%d: %p retried too "
"many times\n", h->ctlr, cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
break;
case CMD_TIMEOUT:
printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
break;
default:
printk(KERN_WARNING "cciss: cmd %p returned "
"unknown status %x\n", cmd,
cmd->err_info->CommandStatus);
rq->errors = make_status_bytes(SAM_STAT_GOOD,
cmd->err_info->CommandStatus, DRIVER_OK,
blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
}
after_error_processing:
/* We need to return this command */
if (retry_cmd) {
resend_cciss_cmd(h, cmd);
return;
}
cmd->rq->completion_data = cmd;
blk_complete_request(cmd->rq);
}
/*
* Get a request and submit it to the controller.
*/
static void do_cciss_request(struct request_queue *q)
{
ctlr_info_t *h = q->queuedata;
CommandList_struct *c;
sector_t start_blk;
int seg;
struct request *creq;
u64bit temp64;
struct scatterlist tmp_sg[MAXSGENTRIES];
drive_info_struct *drv;
int i, dir;
/* We call start_io here in case there is a command waiting on the
* queue that has not been sent.
*/
if (blk_queue_plugged(q))
goto startio;
queue:
creq = blk_peek_request(q);
if (!creq)
goto startio;
BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
if ((c = cmd_alloc(h, 1)) == NULL)
goto full;
blk_start_request(creq);
spin_unlock_irq(q->queue_lock);
c->cmd_type = CMD_RWREQ;
c->rq = creq;
/* fill in the request */
drv = creq->rq_disk->private_data;
c->Header.ReplyQueue = 0; // unused in simple mode
/* got command from pool, so use the command block index instead */
/* for direct lookups. */
/* The first 2 bits are reserved for controller error reporting. */
c->Header.Tag.lower = (c->cmdindex << 3);
c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
c->Header.LUN.LogDev.VolId = drv->LunID;
c->Header.LUN.LogDev.Mode = 1;
c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
c->Request.Type.Type = TYPE_CMD; // It is a command.
c->Request.Type.Attribute = ATTR_SIMPLE;
c->Request.Type.Direction =
(rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
c->Request.Timeout = 0; // Don't time out
c->Request.CDB[0] =
(rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
start_blk = blk_rq_pos(creq);
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
(int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
#endif /* CCISS_DEBUG */
sg_init_table(tmp_sg, MAXSGENTRIES);
seg = blk_rq_map_sg(q, creq, tmp_sg);
/* get the DMA records for the setup */
if (c->Request.Type.Direction == XFER_READ)
dir = PCI_DMA_FROMDEVICE;
else
dir = PCI_DMA_TODEVICE;
for (i = 0; i < seg; i++) {
c->SG[i].Len = tmp_sg[i].length;
temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
tmp_sg[i].offset,
tmp_sg[i].length, dir);
c->SG[i].Addr.lower = temp64.val32.lower;
c->SG[i].Addr.upper = temp64.val32.upper;
c->SG[i].Ext = 0; // we are not chaining
}
/* track how many SG entries we are using */
if (seg > h->maxSG)
h->maxSG = seg;
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
blk_rq_sectors(creq), seg);
#endif /* CCISS_DEBUG */
c->Header.SGList = c->Header.SGTotal = seg;
if (likely(blk_fs_request(creq))) {
if(h->cciss_read == CCISS_READ_10) {
c->Request.CDB[1] = 0;
c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
c->Request.CDB[3] = (start_blk >> 16) & 0xff;
c->Request.CDB[4] = (start_blk >> 8) & 0xff;
c->Request.CDB[5] = start_blk & 0xff;
c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
} else {
u32 upper32 = upper_32_bits(start_blk);
c->Request.CDBLen = 16;
c->Request.CDB[1]= 0;
c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
c->Request.CDB[3]= (upper32 >> 16) & 0xff;
c->Request.CDB[4]= (upper32 >> 8) & 0xff;
c->Request.CDB[5]= upper32 & 0xff;
c->Request.CDB[6]= (start_blk >> 24) & 0xff;
c->Request.CDB[7]= (start_blk >> 16) & 0xff;
c->Request.CDB[8]= (start_blk >> 8) & 0xff;
c->Request.CDB[9]= start_blk & 0xff;
c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
c->Request.CDB[14] = c->Request.CDB[15] = 0;
}
} else if (blk_pc_request(creq)) {
c->Request.CDBLen = creq->cmd_len;
memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
} else {
printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
BUG();
}
spin_lock_irq(q->queue_lock);
addQ(&h->reqQ, c);
h->Qdepth++;
if (h->Qdepth > h->maxQsinceinit)
h->maxQsinceinit = h->Qdepth;
goto queue;
full:
blk_stop_queue(q);
startio:
/* We will already have the driver lock here so not need
* to lock it.
*/
start_io(h);
}
static inline unsigned long get_next_completion(ctlr_info_t *h)
{
return h->access.command_completed(h);
}
static inline int interrupt_pending(ctlr_info_t *h)
{
return h->access.intr_pending(h);
}
static inline long interrupt_not_for_us(ctlr_info_t *h)
{
return (((h->access.intr_pending(h) == 0) ||
(h->interrupts_enabled == 0)));
}
static irqreturn_t do_cciss_intr(int irq, void *dev_id)
{
ctlr_info_t *h = dev_id;
CommandList_struct *c;
unsigned long flags;
__u32 a, a1, a2;
if (interrupt_not_for_us(h))
return IRQ_NONE;
/*
* If there are completed commands in the completion queue,
* we had better do something about it.
*/
spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
while (interrupt_pending(h)) {
while ((a = get_next_completion(h)) != FIFO_EMPTY) {
a1 = a;
if ((a & 0x04)) {
a2 = (a >> 3);
if (a2 >= h->nr_cmds) {
printk(KERN_WARNING
"cciss: controller cciss%d failed, stopping.\n",
h->ctlr);
fail_all_cmds(h->ctlr);
return IRQ_HANDLED;
}
c = h->cmd_pool + a2;
a = c->busaddr;
} else {
struct hlist_node *tmp;
a &= ~3;
c = NULL;
hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
if (c->busaddr == a)
break;
}
}
/*
* If we've found the command, take it off the
* completion Q and free it
*/
if (c && c->busaddr == a) {
removeQ(c);
if (c->cmd_type == CMD_RWREQ) {
complete_command(h, c, 0);
} else if (c->cmd_type == CMD_IOCTL_PEND) {
complete(c->waiting);
}
# ifdef CONFIG_CISS_SCSI_TAPE
else if (c->cmd_type == CMD_SCSI)
complete_scsi_command(c, 0, a1);
# endif
continue;
}
}
}
spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
return IRQ_HANDLED;
}
static int scan_thread(void *data)
{
ctlr_info_t *h = data;
int rc;
DECLARE_COMPLETION_ONSTACK(wait);
h->rescan_wait = &wait;
for (;;) {
rc = wait_for_completion_interruptible(&wait);
if (kthread_should_stop())
break;
if (!rc)
rebuild_lun_table(h, 0);
}
return 0;
}
static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
{
if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
return 0;
switch (c->err_info->SenseInfo[12]) {
case STATE_CHANGED:
printk(KERN_WARNING "cciss%d: a state change "
"detected, command retried\n", h->ctlr);
return 1;
break;
case LUN_FAILED:
printk(KERN_WARNING "cciss%d: LUN failure "
"detected, action required\n", h->ctlr);
return 1;
break;
case REPORT_LUNS_CHANGED:
printk(KERN_WARNING "cciss%d: report LUN data "
"changed\n", h->ctlr);
if (h->rescan_wait)
complete(h->rescan_wait);
return 1;
break;
case POWER_OR_RESET:
printk(KERN_WARNING "cciss%d: a power on "
"or device reset detected\n", h->ctlr);
return 1;
break;
case UNIT_ATTENTION_CLEARED:
printk(KERN_WARNING "cciss%d: unit attention "
"cleared by another initiator\n", h->ctlr);
return 1;
break;
default:
printk(KERN_WARNING "cciss%d: unknown "
"unit attention detected\n", h->ctlr);
return 1;
}
}
/*
* We cannot read the structure directly, for portability we must use
* the io functions.
* This is for debug only.
*/
#ifdef CCISS_DEBUG
static void print_cfg_table(CfgTable_struct *tb)
{
int i;
char temp_name[17];
printk("Controller Configuration information\n");
printk("------------------------------------\n");
for (i = 0; i < 4; i++)
temp_name[i] = readb(&(tb->Signature[i]));
temp_name[4] = '\0';
printk(" Signature = %s\n", temp_name);
printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
printk(" Transport methods supported = 0x%x\n",
readl(&(tb->TransportSupport)));
printk(" Transport methods active = 0x%x\n",
readl(&(tb->TransportActive)));
printk(" Requested transport Method = 0x%x\n",
readl(&(tb->HostWrite.TransportRequest)));
printk(" Coalesce Interrupt Delay = 0x%x\n",
readl(&(tb->HostWrite.CoalIntDelay)));
printk(" Coalesce Interrupt Count = 0x%x\n",
readl(&(tb->HostWrite.CoalIntCount)));
printk(" Max outstanding commands = 0x%d\n",
readl(&(tb->CmdsOutMax)));
printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
for (i = 0; i < 16; i++)
temp_name[i] = readb(&(tb->ServerName[i]));
temp_name[16] = '\0';
printk(" Server Name = %s\n", temp_name);
printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
}
#endif /* CCISS_DEBUG */
static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
{
int i, offset, mem_type, bar_type;
if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
return 0;
offset = 0;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
offset += 4;
else {
mem_type = pci_resource_flags(pdev, i) &
PCI_BASE_ADDRESS_MEM_TYPE_MASK;
switch (mem_type) {
case PCI_BASE_ADDRESS_MEM_TYPE_32:
case PCI_BASE_ADDRESS_MEM_TYPE_1M:
offset += 4; /* 32 bit */
break;
case PCI_BASE_ADDRESS_MEM_TYPE_64:
offset += 8;
break;
default: /* reserved in PCI 2.2 */
printk(KERN_WARNING
"Base address is invalid\n");
return -1;
break;
}
}
if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
return i + 1;
}
return -1;
}
/* If MSI/MSI-X is supported by the kernel we will try to enable it on
* controllers that are capable. If not, we use IO-APIC mode.
*/
static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
struct pci_dev *pdev, __u32 board_id)
{
#ifdef CONFIG_PCI_MSI
int err;
struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
{0, 2}, {0, 3}
};
/* Some boards advertise MSI but don't really support it */
if ((board_id == 0x40700E11) ||
(board_id == 0x40800E11) ||
(board_id == 0x40820E11) || (board_id == 0x40830E11))
goto default_int_mode;
if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
err = pci_enable_msix(pdev, cciss_msix_entries, 4);
if (!err) {
c->intr[0] = cciss_msix_entries[0].vector;
c->intr[1] = cciss_msix_entries[1].vector;
c->intr[2] = cciss_msix_entries[2].vector;
c->intr[3] = cciss_msix_entries[3].vector;
c->msix_vector = 1;
return;
}
if (err > 0) {
printk(KERN_WARNING "cciss: only %d MSI-X vectors "
"available\n", err);
goto default_int_mode;
} else {
printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
err);
goto default_int_mode;
}
}
if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
if (!pci_enable_msi(pdev)) {
c->msi_vector = 1;
} else {
printk(KERN_WARNING "cciss: MSI init failed\n");
}
}
default_int_mode:
#endif /* CONFIG_PCI_MSI */
/* if we get here we're going to use the default interrupt mode */
c->intr[SIMPLE_MODE_INT] = pdev->irq;
return;
}
static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
{
ushort subsystem_vendor_id, subsystem_device_id, command;
__u32 board_id, scratchpad = 0;
__u64 cfg_offset;
__u32 cfg_base_addr;
__u64 cfg_base_addr_index;
int i, err;
/* check to see if controller has been disabled */
/* BEFORE trying to enable it */
(void)pci_read_config_word(pdev, PCI_COMMAND, &command);
if (!(command & 0x02)) {
printk(KERN_WARNING
"cciss: controller appears to be disabled\n");
return -ENODEV;
}
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
return err;
}
err = pci_request_regions(pdev, "cciss");
if (err) {
printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
"aborting\n");
return err;
}
subsystem_vendor_id = pdev->subsystem_vendor;
subsystem_device_id = pdev->subsystem_device;
board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
subsystem_vendor_id);
#ifdef CCISS_DEBUG
printk("command = %x\n", command);
printk("irq = %x\n", pdev->irq);
printk("board_id = %x\n", board_id);
#endif /* CCISS_DEBUG */
/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
* else we use the IO-APIC interrupt assigned to us by system ROM.
*/
cciss_interrupt_mode(c, pdev, board_id);
/* find the memory BAR */
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
break;
}
if (i == DEVICE_COUNT_RESOURCE) {
printk(KERN_WARNING "cciss: No memory BAR found\n");
err = -ENODEV;
goto err_out_free_res;
}
c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
* already removed
*/
#ifdef CCISS_DEBUG
printk("address 0 = %lx\n", c->paddr);
#endif /* CCISS_DEBUG */
c->vaddr = remap_pci_mem(c->paddr, 0x250);
/* Wait for the board to become ready. (PCI hotplug needs this.)
* We poll for up to 120 secs, once per 100ms. */
for (i = 0; i < 1200; i++) {
scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
if (scratchpad == CCISS_FIRMWARE_READY)
break;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10); /* wait 100ms */
}
if (scratchpad != CCISS_FIRMWARE_READY) {
printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
err = -ENODEV;
goto err_out_free_res;
}
/* get the address index number */
cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
cfg_base_addr &= (__u32) 0x0000ffff;
#ifdef CCISS_DEBUG
printk("cfg base address = %x\n", cfg_base_addr);
#endif /* CCISS_DEBUG */
cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
#ifdef CCISS_DEBUG
printk("cfg base address index = %llx\n",
(unsigned long long)cfg_base_addr_index);
#endif /* CCISS_DEBUG */
if (cfg_base_addr_index == -1) {
printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
err = -ENODEV;
goto err_out_free_res;
}
cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
#ifdef CCISS_DEBUG
printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
#endif /* CCISS_DEBUG */
c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
cfg_base_addr_index) +
cfg_offset, sizeof(CfgTable_struct));
c->board_id = board_id;
#ifdef CCISS_DEBUG
print_cfg_table(c->cfgtable);
#endif /* CCISS_DEBUG */
/* Some controllers support Zero Memory Raid (ZMR).
* When configured in ZMR mode the number of supported
* commands drops to 64. So instead of just setting an
* arbitrary value we make the driver a little smarter.
* We read the config table to tell us how many commands
* are supported on the controller then subtract 4 to
* leave a little room for ioctl calls.
*/
c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
for (i = 0; i < ARRAY_SIZE(products); i++) {
if (board_id == products[i].board_id) {
c->product_name = products[i].product_name;
c->access = *(products[i].access);
c->nr_cmds = c->max_commands - 4;
break;
}
}
if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
(readb(&c->cfgtable->Signature[1]) != 'I') ||
(readb(&c->cfgtable->Signature[2]) != 'S') ||
(readb(&c->cfgtable->Signature[3]) != 'S')) {
printk("Does not appear to be a valid CISS config table\n");
err = -ENODEV;
goto err_out_free_res;
}
/* We didn't find the controller in our list. We know the
* signature is valid. If it's an HP device let's try to
* bind to the device and fire it up. Otherwise we bail.
*/
if (i == ARRAY_SIZE(products)) {
if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
c->product_name = products[i-1].product_name;
c->access = *(products[i-1].access);
c->nr_cmds = c->max_commands - 4;
printk(KERN_WARNING "cciss: This is an unknown "
"Smart Array controller.\n"
"cciss: Please update to the latest driver "
"available from www.hp.com.\n");
} else {
printk(KERN_WARNING "cciss: Sorry, I don't know how"
" to access the Smart Array controller %08lx\n"
, (unsigned long)board_id);
err = -ENODEV;
goto err_out_free_res;
}
}
#ifdef CONFIG_X86
{
/* Need to enable prefetch in the SCSI core for 6400 in x86 */
__u32 prefetch;
prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
prefetch |= 0x100;
writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
}
#endif
/* Disabling DMA prefetch and refetch for the P600.
* An ASIC bug may result in accesses to invalid memory addresses.
* We've disabled prefetch for some time now. Testing with XEN
* kernels revealed a bug in the refetch if dom0 resides on a P600.
*/
if(board_id == 0x3225103C) {
__u32 dma_prefetch;
__u32 dma_refetch;
dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
dma_prefetch |= 0x8000;
writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
dma_refetch |= 0x1;
pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
}
#ifdef CCISS_DEBUG
printk("Trying to put board into Simple mode\n");
#endif /* CCISS_DEBUG */
c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
/* Update the field, and then ring the doorbell */
writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
/* under certain very rare conditions, this can take awhile.
* (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
* as we enter this code.) */
for (i = 0; i < MAX_CONFIG_WAIT; i++) {
if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
break;
/* delay and try again */
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(10);
}
#ifdef CCISS_DEBUG
printk(KERN_DEBUG "I counter got to %d %x\n", i,
readl(c->vaddr + SA5_DOORBELL));
#endif /* CCISS_DEBUG */
#ifdef CCISS_DEBUG
print_cfg_table(c->cfgtable);
#endif /* CCISS_DEBUG */
if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
printk(KERN_WARNING "cciss: unable to get board into"
" simple mode\n");
err = -ENODEV;
goto err_out_free_res;
}
return 0;
err_out_free_res:
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo
*/
pci_release_regions(pdev);
return err;
}
/* Function to find the first free pointer into our hba[] array
* Returns -1 if no free entries are left.
*/
static int alloc_cciss_hba(void)
{
int i;
for (i = 0; i < MAX_CTLR; i++) {
if (!hba[i]) {
ctlr_info_t *p;
p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
if (!p)
goto Enomem;
hba[i] = p;
return i;
}
}
printk(KERN_WARNING "cciss: This driver supports a maximum"
" of %d controllers.\n", MAX_CTLR);
return -1;
Enomem:
printk(KERN_ERR "cciss: out of memory.\n");
return -1;
}
static void free_hba(int i)
{
ctlr_info_t *p = hba[i];
int n;
hba[i] = NULL;
for (n = 0; n < CISS_MAX_LUN; n++)
put_disk(p->gendisk[n]);
kfree(p);
}
/* Send a message CDB to the firmware. */
static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
{
typedef struct {
CommandListHeader_struct CommandHeader;
RequestBlock_struct Request;
ErrDescriptor_struct ErrorDescriptor;
} Command;
static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
Command *cmd;
dma_addr_t paddr64;
uint32_t paddr32, tag;
void __iomem *vaddr;
int i, err;
vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
if (vaddr == NULL)
return -ENOMEM;
/* The Inbound Post Queue only accepts 32-bit physical addresses for the
CCISS commands, so they must be allocated from the lower 4GiB of
memory. */
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
iounmap(vaddr);
return -ENOMEM;
}
cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
if (cmd == NULL) {
iounmap(vaddr);
return -ENOMEM;
}
/* This must fit, because of the 32-bit consistent DMA mask. Also,
although there's no guarantee, we assume that the address is at
least 4-byte aligned (most likely, it's page-aligned). */
paddr32 = paddr64;
cmd->CommandHeader.ReplyQueue = 0;
cmd->CommandHeader.SGList = 0;
cmd->CommandHeader.SGTotal = 0;
cmd->CommandHeader.Tag.lower = paddr32;
cmd->CommandHeader.Tag.upper = 0;
memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
cmd->Request.CDBLen = 16;
cmd->Request.Type.Type = TYPE_MSG;
cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
cmd->Request.Type.Direction = XFER_NONE;
cmd->Request.Timeout = 0; /* Don't time out */
cmd->Request.CDB[0] = opcode;
cmd->Request.CDB[1] = type;
memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
cmd->ErrorDescriptor.Addr.upper = 0;
cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
for (i = 0; i < 10; i++) {
tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
if ((tag & ~3) == paddr32)
break;
schedule_timeout_uninterruptible(HZ);
}
iounmap(vaddr);
/* we leak the DMA buffer here ... no choice since the controller could
still complete the command. */
if (i == 10) {
printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
opcode, type);
return -ETIMEDOUT;
}
pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
if (tag & 2) {
printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
opcode, type);
return -EIO;
}
printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
opcode, type);
return 0;
}
#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
#define cciss_noop(p) cciss_message(p, 3, 0)
static __devinit int cciss_reset_msi(struct pci_dev *pdev)
{
/* the #defines are stolen from drivers/pci/msi.h. */
#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
int pos;
u16 control = 0;
pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
if (pos) {
pci_read_config_word(pdev, msi_control_reg(pos), &control);
if (control & PCI_MSI_FLAGS_ENABLE) {
printk(KERN_INFO "cciss: resetting MSI\n");
pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
}
}
pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
if (pos) {
pci_read_config_word(pdev, msi_control_reg(pos), &control);
if (control & PCI_MSIX_FLAGS_ENABLE) {
printk(KERN_INFO "cciss: resetting MSI-X\n");
pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
}
}
return 0;
}
/* This does a hard reset of the controller using PCI power management
* states. */
static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
{
u16 pmcsr, saved_config_space[32];
int i, pos;
printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
/* This is very nearly the same thing as
pci_save_state(pci_dev);
pci_set_power_state(pci_dev, PCI_D3hot);
pci_set_power_state(pci_dev, PCI_D0);
pci_restore_state(pci_dev);
but we can't use these nice canned kernel routines on
kexec, because they also check the MSI/MSI-X state in PCI
configuration space and do the wrong thing when it is
set/cleared. Also, the pci_save/restore_state functions
violate the ordering requirements for restoring the
configuration space from the CCISS document (see the
comment below). So we roll our own .... */
for (i = 0; i < 32; i++)
pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
if (pos == 0) {
printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
return -ENODEV;
}
/* Quoting from the Open CISS Specification: "The Power
* Management Control/Status Register (CSR) controls the power
* state of the device. The normal operating state is D0,
* CSR=00h. The software off state is D3, CSR=03h. To reset
* the controller, place the interface device in D3 then to
* D0, this causes a secondary PCI reset which will reset the
* controller." */
/* enter the D3hot power management state */
pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
pmcsr |= PCI_D3hot;
pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
schedule_timeout_uninterruptible(HZ >> 1);
/* enter the D0 power management state */
pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
pmcsr |= PCI_D0;
pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
schedule_timeout_uninterruptible(HZ >> 1);
/* Restore the PCI configuration space. The Open CISS
* Specification says, "Restore the PCI Configuration
* Registers, offsets 00h through 60h. It is important to
* restore the command register, 16-bits at offset 04h,
* last. Do not restore the configuration status register,
* 16-bits at offset 06h." Note that the offset is 2*i. */
for (i = 0; i < 32; i++) {
if (i == 2 || i == 3)
continue;
pci_write_config_word(pdev, 2*i, saved_config_space[i]);
}
wmb();
pci_write_config_word(pdev, 4, saved_config_space[2]);
return 0;
}
/*
* This is it. Find all the controllers and register them. I really hate
* stealing all these major device numbers.
* returns the number of block devices registered.
*/
static int __devinit cciss_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int i;
int j = 0;
int rc;
int dac, return_code;
InquiryData_struct *inq_buff;
if (reset_devices) {
/* Reset the controller with a PCI power-cycle */
if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
return -ENODEV;
/* Now try to get the controller to respond to a no-op. Some
devices (notably the HP Smart Array 5i Controller) need
up to 30 seconds to respond. */
for (i=0; i<30; i++) {
if (cciss_noop(pdev) == 0)
break;
schedule_timeout_uninterruptible(HZ);
}
if (i == 30) {
printk(KERN_ERR "cciss: controller seems dead\n");
return -EBUSY;
}
}
i = alloc_cciss_hba();
if (i < 0)
return -1;
hba[i]->busy_initializing = 1;
INIT_HLIST_HEAD(&hba[i]->cmpQ);
INIT_HLIST_HEAD(&hba[i]->reqQ);
if (cciss_pci_init(hba[i], pdev) != 0)
goto clean0;
sprintf(hba[i]->devname, "cciss%d", i);
hba[i]->ctlr = i;
hba[i]->pdev = pdev;
if (cciss_create_hba_sysfs_entry(hba[i]))
goto clean0;
/* configure PCI DMA stuff */
if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
dac = 1;
else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
dac = 0;
else {
printk(KERN_ERR "cciss: no suitable DMA available\n");
goto clean1;
}
/*
* register with the major number, or get a dynamic major number
* by passing 0 as argument. This is done for greater than
* 8 controller support.
*/
if (i < MAX_CTLR_ORIG)
hba[i]->major = COMPAQ_CISS_MAJOR + i;
rc = register_blkdev(hba[i]->major, hba[i]->devname);
if (rc == -EBUSY || rc == -EINVAL) {
printk(KERN_ERR
"cciss: Unable to get major number %d for %s "
"on hba %d\n", hba[i]->major, hba[i]->devname, i);
goto clean1;
} else {
if (i >= MAX_CTLR_ORIG)
hba[i]->major = rc;
}
/* make sure the board interrupts are off */
hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
goto clean2;
}
printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
hba[i]->devname, pdev->device, pci_name(pdev),
hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
hba[i]->cmd_pool_bits =
kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
* sizeof(unsigned long), GFP_KERNEL);
hba[i]->cmd_pool = (CommandList_struct *)
pci_alloc_consistent(hba[i]->pdev,
hba[i]->nr_cmds * sizeof(CommandList_struct),
&(hba[i]->cmd_pool_dhandle));
hba[i]->errinfo_pool = (ErrorInfo_struct *)
pci_alloc_consistent(hba[i]->pdev,
hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
&(hba[i]->errinfo_pool_dhandle));
if ((hba[i]->cmd_pool_bits == NULL)
|| (hba[i]->cmd_pool == NULL)
|| (hba[i]->errinfo_pool == NULL)) {
printk(KERN_ERR "cciss: out of memory");
goto clean4;
}
spin_lock_init(&hba[i]->lock);
/* Initialize the pdev driver private data.
have it point to hba[i]. */
pci_set_drvdata(pdev, hba[i]);
/* command and error info recs zeroed out before
they are used */
memset(hba[i]->cmd_pool_bits, 0,
DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
* sizeof(unsigned long));
hba[i]->num_luns = 0;
hba[i]->highest_lun = -1;
for (j = 0; j < CISS_MAX_LUN; j++) {
hba[i]->drv[j].raid_level = -1;
hba[i]->drv[j].queue = NULL;
hba[i]->gendisk[j] = NULL;
}
cciss_scsi_setup(i);
/* Turn the interrupts on so we can service requests */
hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
/* Get the firmware version */
inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
if (inq_buff == NULL) {
printk(KERN_ERR "cciss: out of memory\n");
goto clean4;
}
return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
if (return_code == IO_OK) {
hba[i]->firm_ver[0] = inq_buff->data_byte[32];
hba[i]->firm_ver[1] = inq_buff->data_byte[33];
hba[i]->firm_ver[2] = inq_buff->data_byte[34];
hba[i]->firm_ver[3] = inq_buff->data_byte[35];
} else { /* send command failed */
printk(KERN_WARNING "cciss: unable to determine firmware"
" version of controller\n");
}
kfree(inq_buff);
cciss_procinit(i);
hba[i]->cciss_max_sectors = 2048;
hba[i]->busy_initializing = 0;
rebuild_lun_table(hba[i], 1);
hba[i]->cciss_scan_thread = kthread_run(scan_thread, hba[i],
"cciss_scan%02d", i);
if (IS_ERR(hba[i]->cciss_scan_thread))
return PTR_ERR(hba[i]->cciss_scan_thread);
return 1;
clean4:
kfree(hba[i]->cmd_pool_bits);
if (hba[i]->cmd_pool)
pci_free_consistent(hba[i]->pdev,
hba[i]->nr_cmds * sizeof(CommandList_struct),
hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
if (hba[i]->errinfo_pool)
pci_free_consistent(hba[i]->pdev,
hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
hba[i]->errinfo_pool,
hba[i]->errinfo_pool_dhandle);
free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
clean2:
unregister_blkdev(hba[i]->major, hba[i]->devname);
clean1:
cciss_destroy_hba_sysfs_entry(hba[i]);
clean0:
hba[i]->busy_initializing = 0;
/* cleanup any queues that may have been initialized */
for (j=0; j <= hba[i]->highest_lun; j++){
drive_info_struct *drv = &(hba[i]->drv[j]);
if (drv->queue)
blk_cleanup_queue(drv->queue);
}
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo
*/
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
free_hba(i);
return -1;
}
static void cciss_shutdown(struct pci_dev *pdev)
{
ctlr_info_t *tmp_ptr;
int i;
char flush_buf[4];
int return_code;
tmp_ptr = pci_get_drvdata(pdev);
if (tmp_ptr == NULL)
return;
i = tmp_ptr->ctlr;
if (hba[i] == NULL)
return;
/* Turn board interrupts off and send the flush cache command */
/* sendcmd will turn off interrupt, and send the flush...
* To write all data in the battery backed cache to disks */
memset(flush_buf, 0, 4);
return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
CTLR_LUNID, TYPE_CMD);
if (return_code == IO_OK) {
printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
} else {
printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
}
free_irq(hba[i]->intr[2], hba[i]);
}
static void __devexit cciss_remove_one(struct pci_dev *pdev)
{
ctlr_info_t *tmp_ptr;
int i, j;
if (pci_get_drvdata(pdev) == NULL) {
printk(KERN_ERR "cciss: Unable to remove device \n");
return;
}
tmp_ptr = pci_get_drvdata(pdev);
i = tmp_ptr->ctlr;
if (hba[i] == NULL) {
printk(KERN_ERR "cciss: device appears to "
"already be removed \n");
return;
}
kthread_stop(hba[i]->cciss_scan_thread);
remove_proc_entry(hba[i]->devname, proc_cciss);
unregister_blkdev(hba[i]->major, hba[i]->devname);
/* remove it from the disk list */
for (j = 0; j < CISS_MAX_LUN; j++) {
struct gendisk *disk = hba[i]->gendisk[j];
if (disk) {
struct request_queue *q = disk->queue;
if (disk->flags & GENHD_FL_UP)
del_gendisk(disk);
if (q)
blk_cleanup_queue(q);
}
}
#ifdef CONFIG_CISS_SCSI_TAPE
cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
#endif
cciss_shutdown(pdev);
#ifdef CONFIG_PCI_MSI
if (hba[i]->msix_vector)
pci_disable_msix(hba[i]->pdev);
else if (hba[i]->msi_vector)
pci_disable_msi(hba[i]->pdev);
#endif /* CONFIG_PCI_MSI */
iounmap(hba[i]->vaddr);
pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
kfree(hba[i]->cmd_pool_bits);
/*
* Deliberately omit pci_disable_device(): it does something nasty to
* Smart Array controllers that pci_enable_device does not undo
*/
pci_release_regions(pdev);
pci_set_drvdata(pdev, NULL);
cciss_destroy_hba_sysfs_entry(hba[i]);
free_hba(i);
}
static struct pci_driver cciss_pci_driver = {
.name = "cciss",
.probe = cciss_init_one,
.remove = __devexit_p(cciss_remove_one),
.id_table = cciss_pci_device_id, /* id_table */
.shutdown = cciss_shutdown,
};
/*
* This is it. Register the PCI driver information for the cards we control
* the OS will call our registered routines when it finds one of our cards.
*/
static int __init cciss_init(void)
{
int err;
/*
* The hardware requires that commands are aligned on a 64-bit
* boundary. Given that we use pci_alloc_consistent() to allocate an
* array of them, the size must be a multiple of 8 bytes.
*/
BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
printk(KERN_INFO DRIVER_NAME "\n");
err = bus_register(&cciss_bus_type);
if (err)
return err;
/* Register for our PCI devices */
err = pci_register_driver(&cciss_pci_driver);
if (err)
goto err_bus_register;
return 0;
err_bus_register:
bus_unregister(&cciss_bus_type);
return err;
}
static void __exit cciss_cleanup(void)
{
int i;
pci_unregister_driver(&cciss_pci_driver);
/* double check that all controller entrys have been removed */
for (i = 0; i < MAX_CTLR; i++) {
if (hba[i] != NULL) {
printk(KERN_WARNING "cciss: had to remove"
" controller %d\n", i);
cciss_remove_one(hba[i]->pdev);
}
}
remove_proc_entry("driver/cciss", NULL);
bus_unregister(&cciss_bus_type);
}
static void fail_all_cmds(unsigned long ctlr)
{
/* If we get here, the board is apparently dead. */
ctlr_info_t *h = hba[ctlr];
CommandList_struct *c;
unsigned long flags;
printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
h->alive = 0; /* the controller apparently died... */
spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
pci_disable_device(h->pdev); /* Make sure it is really dead. */
/* move everything off the request queue onto the completed queue */
while (!hlist_empty(&h->reqQ)) {
c = hlist_entry(h->reqQ.first, CommandList_struct, list);
removeQ(c);
h->Qdepth--;
addQ(&h->cmpQ, c);
}
/* Now, fail everything on the completed queue with a HW error */
while (!hlist_empty(&h->cmpQ)) {
c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
removeQ(c);
if (c->cmd_type != CMD_MSG_STALE)
c->err_info->CommandStatus = CMD_HARDWARE_ERR;
if (c->cmd_type == CMD_RWREQ) {
complete_command(h, c, 0);
} else if (c->cmd_type == CMD_IOCTL_PEND)
complete(c->waiting);
#ifdef CONFIG_CISS_SCSI_TAPE
else if (c->cmd_type == CMD_SCSI)
complete_scsi_command(c, 0, 0);
#endif
}
spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
return;
}
module_init(cciss_init);
module_exit(cciss_cleanup);
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